diff --git a/src/fonts.js b/src/fonts.js
index 289a2dd9c..6ee5a2a73 100644
--- a/src/fonts.js
+++ b/src/fonts.js
@@ -5794,7 +5794,7 @@ var CFFFont = (function CFFFontClosure() {
       } else {
         for (var charcode in encoding)
           inverseEncoding[encoding[charcode]] = charcode | 0;
-        if (charsets[0] === '.notedef') {
+        if (charsets[0] === '.notdef') {
           gidStart = 1;
         }
       }