diff --git a/demo/markdownlint-browser.js b/demo/markdownlint-browser.js
index 12327491..ce6b235b 100644
--- a/demo/markdownlint-browser.js
+++ b/demo/markdownlint-browser.js
@@ -6229,7 +6229,7 @@ var anchorRe = /\{(#[0-9a-z]+(?:[\x2D_][0-9a-z]+)*)\}/g;
 
 // Sets for filtering heading tokens during conversion
 var childrenExclude = new Set(["image", "reference", "resource"]);
-var tokensInclude = new Set(["codeTextData", "data"]);
+var tokensInclude = new Set(["characterEscapeValue", "codeTextData", "data"]);
 
 /**
  * @typedef {import("../helpers/micromark.cjs").Token} Token
diff --git a/lib/md051.js b/lib/md051.js
index be2e15d7..98606bda 100644
--- a/lib/md051.js
+++ b/lib/md051.js
@@ -13,7 +13,9 @@ const anchorRe = /\{(#[a-z\d]+(?:[-_][a-z\d]+)*)\}/gu;
 
 // Sets for filtering heading tokens during conversion
 const childrenExclude = new Set([ "image", "reference", "resource" ]);
-const tokensInclude = new Set([ "codeTextData", "data" ]);
+const tokensInclude = new Set(
+  [ "characterEscapeValue", "codeTextData", "data" ]
+);
 
 /**
  * @typedef {import("../helpers/micromark.cjs").Token} Token
diff --git a/test/link-fragments.md b/test/link-fragments.md
index 0e62996d..01eab952 100644
--- a/test/link-fragments.md
+++ b/test/link-fragments.md
@@ -68,6 +68,8 @@
 
 [Valid](#valid\_heading\-escaped\_underscores)
 
+[Valid](#valid-heading-with_embedded_escaping)
+
 [Valid](#namedlink)
 
 [Valid](#idlink)
@@ -167,6 +169,8 @@ Text
 
 ### Valid_Heading Escaped_Underscores
 
+### Valid Heading\-With\_Embedded\_Escaping
+
 <a name="namedlink"></a>
 
 <a id = idlink></a>
diff --git a/test/snapshots/markdownlint-test-scenarios.js.md b/test/snapshots/markdownlint-test-scenarios.js.md
index 2006fc51..d3a08092 100644
--- a/test/snapshots/markdownlint-test-scenarios.js.md
+++ b/test/snapshots/markdownlint-test-scenarios.js.md
@@ -23989,7 +23989,7 @@ Generated by [AVA](https://avajs.dev).
             37,
           ],
           fixInfo: null,
-          lineNumber: 192,
+          lineNumber: 196,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24005,7 +24005,7 @@ Generated by [AVA](https://avajs.dev).
             31,
           ],
           fixInfo: null,
-          lineNumber: 194,
+          lineNumber: 198,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24021,7 +24021,7 @@ Generated by [AVA](https://avajs.dev).
             36,
           ],
           fixInfo: null,
-          lineNumber: 196,
+          lineNumber: 200,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24037,7 +24037,7 @@ Generated by [AVA](https://avajs.dev).
             28,
           ],
           fixInfo: null,
-          lineNumber: 198,
+          lineNumber: 202,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24053,7 +24053,7 @@ Generated by [AVA](https://avajs.dev).
             18,
           ],
           fixInfo: null,
-          lineNumber: 200,
+          lineNumber: 204,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24073,7 +24073,7 @@ Generated by [AVA](https://avajs.dev).
             editColumn: 11,
             insertText: '#HREFandID',
           },
-          lineNumber: 202,
+          lineNumber: 206,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24089,7 +24089,7 @@ Generated by [AVA](https://avajs.dev).
             34,
           ],
           fixInfo: null,
-          lineNumber: 204,
+          lineNumber: 208,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24105,7 +24105,7 @@ Generated by [AVA](https://avajs.dev).
             34,
           ],
           fixInfo: null,
-          lineNumber: 206,
+          lineNumber: 210,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24121,7 +24121,7 @@ Generated by [AVA](https://avajs.dev).
             39,
           ],
           fixInfo: null,
-          lineNumber: 208,
+          lineNumber: 212,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24134,7 +24134,7 @@ Generated by [AVA](https://avajs.dev).
           errorDetail: null,
           errorRange: null,
           fixInfo: null,
-          lineNumber: 210,
+          lineNumber: 214,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24150,7 +24150,7 @@ Generated by [AVA](https://avajs.dev).
             28,
           ],
           fixInfo: null,
-          lineNumber: 215,
+          lineNumber: 219,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24170,7 +24170,7 @@ Generated by [AVA](https://avajs.dev).
             editColumn: 9,
             insertText: '#valid-fragments',
           },
-          lineNumber: 219,
+          lineNumber: 223,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24190,7 +24190,7 @@ Generated by [AVA](https://avajs.dev).
             editColumn: 12,
             insertText: '#namedlink',
           },
-          lineNumber: 221,
+          lineNumber: 225,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24203,7 +24203,7 @@ Generated by [AVA](https://avajs.dev).
           errorDetail: 'Expected: #namedlink; Actual: #NAMEDLINK',
           errorRange: null,
           fixInfo: null,
-          lineNumber: 223,
+          lineNumber: 227,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24223,7 +24223,7 @@ Generated by [AVA](https://avajs.dev).
             editColumn: 13,
             insertText: '#idlink',
           },
-          lineNumber: 228,
+          lineNumber: 232,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24239,7 +24239,7 @@ Generated by [AVA](https://avajs.dev).
             26,
           ],
           fixInfo: null,
-          lineNumber: 263,
+          lineNumber: 267,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24255,7 +24255,7 @@ Generated by [AVA](https://avajs.dev).
             26,
           ],
           fixInfo: null,
-          lineNumber: 265,
+          lineNumber: 269,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24271,7 +24271,7 @@ Generated by [AVA](https://avajs.dev).
             20,
           ],
           fixInfo: null,
-          lineNumber: 267,
+          lineNumber: 271,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24287,7 +24287,7 @@ Generated by [AVA](https://avajs.dev).
             23,
           ],
           fixInfo: null,
-          lineNumber: 269,
+          lineNumber: 273,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24303,7 +24303,7 @@ Generated by [AVA](https://avajs.dev).
             22,
           ],
           fixInfo: null,
-          lineNumber: 271,
+          lineNumber: 275,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24319,7 +24319,7 @@ Generated by [AVA](https://avajs.dev).
             42,
           ],
           fixInfo: null,
-          lineNumber: 273,
+          lineNumber: 277,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24335,7 +24335,7 @@ Generated by [AVA](https://avajs.dev).
             21,
           ],
           fixInfo: null,
-          lineNumber: 275,
+          lineNumber: 279,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24351,7 +24351,7 @@ Generated by [AVA](https://avajs.dev).
             21,
           ],
           fixInfo: null,
-          lineNumber: 277,
+          lineNumber: 281,
           ruleDescription: 'Link fragments should be valid',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md051.md',
           ruleNames: [
@@ -24430,6 +24430,8 @@ Generated by [AVA](https://avajs.dev).
       ␊
       [Valid](#valid\\_heading\\-escaped\\_underscores)␊
       ␊
+      [Valid](#valid-heading-with_embedded_escaping)␊
+      ␊
       [Valid](#namedlink)␊
       ␊
       [Valid](#idlink)␊
@@ -24529,6 +24531,8 @@ Generated by [AVA](https://avajs.dev).
       ␊
       ### Valid_Heading Escaped_Underscores␊
       ␊
+      ### Valid Heading\\-With\\_Embedded\\_Escaping␊
+      ␊
       <a name="namedlink"></a>␊
       ␊
       <a id = idlink></a>␊
diff --git a/test/snapshots/markdownlint-test-scenarios.js.snap b/test/snapshots/markdownlint-test-scenarios.js.snap
index 5b24c07c..d604f422 100644
Binary files a/test/snapshots/markdownlint-test-scenarios.js.snap and b/test/snapshots/markdownlint-test-scenarios.js.snap differ