diff --git a/lib/rules.js b/lib/rules.js
index 00e07521..2bf6f0d5 100644
--- a/lib/rules.js
+++ b/lib/rules.js
@@ -428,7 +428,7 @@ module.exports = [
         } else if (token.type === "inline") {
           token.content.split(shared.newLineRe)
             .forEach(function forLine(line, offset) {
-              if (/^(-+|=+)\s*$/.test(line)) {
+              if (token.map && /^(-+|=+)\s*$/.test(line)) {
                 var seTextLineNumber = token.map[0] + offset;
                 if (seTextLineNumber > 0) {
                   errors.push(seTextLineNumber);
diff --git a/test/simple-table.md b/test/simple-table.md
new file mode 100644
index 00000000..c5d09511
--- /dev/null
+++ b/test/simple-table.md
@@ -0,0 +1,7 @@
+# Header
+
+| Head |
+| ---- |
+| Cell |
+| ==== |
+| Foot |