diff --git a/addon/fold/comment-fold.js b/addon/fold/comment-fold.js
index 60fa3e43df..e8d800eb59 100644
--- a/addon/fold/comment-fold.js
+++ b/addon/fold/comment-fold.js
@@ -29,7 +29,7 @@ CodeMirror.registerGlobalHelper("fold", "comment", function(mode) {
     }
     if (pass == 1 && found < start.ch) return;
     if (/comment/.test(cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1))) &&
-        (lineText.slice(found - endToken.length, found) == endToken ||
+        (found == 0 || lineText.slice(found - endToken.length, found) == endToken ||
          !/comment/.test(cm.getTokenTypeAt(CodeMirror.Pos(line, found))))) {
       startCh = found + startToken.length;
       break;