diff --git a/lib/md037.js b/lib/md037.js
index 1e4b77c3..95cd2c31 100644
--- a/lib/md037.js
+++ b/lib/md037.js
@@ -13,31 +13,37 @@ module.exports = {
   "tags": [ "whitespace", "emphasis" ],
   "function": function MD037(params, onError) {
     forEachInlineChild(params, "text", (token) => {
+      const { content, lineNumber } = token;
+      const columnsReported = [];
       [ leftSpaceRe, rightSpaceRe ].forEach((spaceRe, index) => {
         let match = null;
-        while ((match = spaceRe.exec(token.content)) !== null) {
+        while ((match = spaceRe.exec(content)) !== null) {
           const [ fullText, marker ] = match;
-          const line = params.lines[token.lineNumber - 1];
+          const line = params.lines[lineNumber - 1];
           if (line.includes(fullText)) {
             const text = fullText.trim();
             const column = line.indexOf(text) + 1;
-            const length = text.length;
-            const markerLength = marker.length;
-            const emphasized = text.slice(markerLength, length - markerLength);
-            const fixedText = `${marker}${emphasized.trim()}${marker}`;
-            addErrorContext(
-              onError,
-              token.lineNumber,
-              text,
-              index === 0,
-              index !== 0,
-              [ column, length ],
-              {
-                "editColumn": column,
-                "deleteCount": length,
-                "insertText": fixedText
-              }
-            );
+            if (!columnsReported.includes(column)) {
+              const length = text.length;
+              const markerLength = marker.length;
+              const emphasized =
+                text.slice(markerLength, length - markerLength);
+              const fixedText = `${marker}${emphasized.trim()}${marker}`;
+              addErrorContext(
+                onError,
+                lineNumber,
+                text,
+                index === 0,
+                index !== 0,
+                [ column, length ],
+                {
+                  "editColumn": column,
+                  "deleteCount": length,
+                  "insertText": fixedText
+                }
+              );
+              columnsReported.push(column);
+            }
           }
         }
       });
diff --git a/test/markdownlint-test.js b/test/markdownlint-test.js
index c34dc559..05d84696 100644
--- a/test/markdownlint-test.js
+++ b/test/markdownlint-test.js
@@ -522,7 +522,8 @@ module.exports.resultFormattingV3 = function resultFormattingV3(test) {
       "input":
         "# Heading   \n" +
         "\n" +
-        "Text\ttext\t\ttext"
+        "Text\ttext\t\ttext\n" +
+        "Text * emphasis * text"
     },
     "resultVersion": 3
   };
@@ -572,16 +573,30 @@ module.exports.resultFormattingV3 = function resultFormattingV3(test) {
           }
         },
         {
-          "lineNumber": 3,
+          "lineNumber": 4,
+          "ruleNames": [ "MD037", "no-space-in-emphasis" ],
+          "ruleDescription": "Spaces inside emphasis markers",
+          "ruleInformation": `${homepage}/blob/v${version}/doc/Rules.md#md037`,
+          "errorDetail": null,
+          "errorContext": "* emphasis *",
+          "errorRange": [ 6, 12 ],
+          "fixInfo": {
+            "editColumn": 6,
+            "deleteCount": 12,
+            "insertText": "*emphasis*"
+          }
+        },
+        {
+          "lineNumber": 4,
           "ruleNames": [ "MD047", "single-trailing-newline" ],
           "ruleDescription": "Files should end with a single newline character",
           "ruleInformation": `${homepage}/blob/v${version}/doc/Rules.md#md047`,
           "errorDetail": null,
           "errorContext": null,
-          "errorRange": [ 15, 1 ],
+          "errorRange": [ 22, 1 ],
           "fixInfo": {
             "insertText": "\n",
-            "editColumn": 16
+            "editColumn": 23
           }
         }
       ]
@@ -595,7 +610,9 @@ module.exports.resultFormattingV3 = function resultFormattingV3(test) {
       " Hard tabs [Column: 5]\n" +
       "input: 3: MD010/no-hard-tabs" +
       " Hard tabs [Column: 10]\n" +
-      "input: 3: MD047/single-trailing-newline" +
+      "input: 4: MD037/no-space-in-emphasis" +
+      " Spaces inside emphasis markers [Context: \"* emphasis *\"]\n" +
+      "input: 4: MD047/single-trailing-newline" +
       " Files should end with a single newline character";
     test.equal(actualMessage, expectedMessage, "Incorrect message.");
     test.done();