diff --git a/bower.json b/bower.json
index 4f2c83f04..9c719a697 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.332",
+  "version": "1.0.334",
   "keywords": [
     "Mozilla",
     "pdf",
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index ad7a22fff..4639b3e55 100644
--- a/build/pdf.combined.js
+++ b/build/pdf.combined.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.332';
-PDFJS.build = '12a35f2';
+PDFJS.version = '1.0.334';
+PDFJS.build = '75859b8';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -20469,6 +20469,11 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
           return errorFont();
         }
       }
+      if (!fontRef) {
+        warn('fontRef not available');
+        return errorFont();
+      }
+
       if (this.fontCache.has(fontRef)) {
         return this.fontCache.get(fontRef);
       }
diff --git a/build/pdf.js b/build/pdf.js
index a070fe8af..b1ddef98e 100644
--- a/build/pdf.js
+++ b/build/pdf.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.332';
-PDFJS.build = '12a35f2';
+PDFJS.version = '1.0.334';
+PDFJS.build = '75859b8';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index 234058542..160fd8e21 100644
--- a/build/pdf.worker.js
+++ b/build/pdf.worker.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.332';
-PDFJS.build = '12a35f2';
+PDFJS.version = '1.0.334';
+PDFJS.build = '75859b8';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -15953,6 +15953,11 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
           return errorFont();
         }
       }
+      if (!fontRef) {
+        warn('fontRef not available');
+        return errorFont();
+      }
+
       if (this.fontCache.has(fontRef)) {
         return this.fontCache.get(fontRef);
       }
diff --git a/package.json b/package.json
index 19b8f217e..fbfc9eb0a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.332",
+  "version": "1.0.334",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",