diff --git a/acorn.js b/acorn.js
index 375d44b09e..43584ba8e1 100644
--- a/acorn.js
+++ b/acorn.js
@@ -500,7 +500,7 @@
     var start = tokPos;
     var startLoc = options.onComment && options.locations && new line_loc_t;
     var ch = input.charCodeAt(tokPos+=2);
-    while (tokPos < inputLen && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8329) {
+    while (tokPos < inputLen && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
       ++tokPos;
       ch = input.charCodeAt(tokPos);
     }
@@ -857,7 +857,7 @@
           }
         }
       } else {
-        if (ch === 13 || ch === 10 || ch === 8232 || ch === 8329) raise(tokStart, "Unterminated string constant");
+        if (ch === 13 || ch === 10 || ch === 8232 || ch === 8233) raise(tokStart, "Unterminated string constant");
         out += String.fromCharCode(ch); // '\'
         ++tokPos;
       }