diff --git a/src/core/evaluator.js b/src/core/evaluator.js
index 5956c540d..c099fe9d4 100644
--- a/src/core/evaluator.js
+++ b/src/core/evaluator.js
@@ -354,7 +354,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
       var glyphs = font.charsToGlyphs(chars);
       var isAddToPathSet = !!(this.state.textRenderingMode &
                               TextRenderingMode.ADD_TO_PATH_FLAG);
-      if (isAddToPathSet || PDFJS.disableFontFace) {
+      if (font.data && (isAddToPathSet || PDFJS.disableFontFace)) {
         for (var i = 0; i < glyphs.length; i++) {
           if (glyphs[i] === null) {
             continue;