diff --git a/bower.json b/bower.json
index bea8ac8b7..af43e1e3f 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.324",
+  "version": "1.0.326",
   "keywords": [
     "Mozilla",
     "pdf",
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index 829c9485a..8d3d55432 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 = '1.0.324';
-PDFJS.build = 'd487d42';
+PDFJS.version = '1.0.326';
+PDFJS.build = '36c0c64';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -4307,7 +4307,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
 
   function genericComposeSMask(maskCtx, layerCtx, width, height,
                                subtype, backdrop) {
-    var hasBackdrop = backdrop !== undefined;
+    var hasBackdrop = !!backdrop;
     var r0 = hasBackdrop ? backdrop[0] : 0;
     var g0 = hasBackdrop ? backdrop[1] : 0;
     var b0 = hasBackdrop ? backdrop[2] : 0;
diff --git a/build/pdf.js b/build/pdf.js
index ed2718fdc..93a1ef4fe 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 = '1.0.324';
-PDFJS.build = 'd487d42';
+PDFJS.version = '1.0.326';
+PDFJS.build = '36c0c64';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -4355,7 +4355,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
 
   function genericComposeSMask(maskCtx, layerCtx, width, height,
                                subtype, backdrop) {
-    var hasBackdrop = backdrop !== undefined;
+    var hasBackdrop = !!backdrop;
     var r0 = hasBackdrop ? backdrop[0] : 0;
     var g0 = hasBackdrop ? backdrop[1] : 0;
     var b0 = hasBackdrop ? backdrop[2] : 0;
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index b71d7c0c1..783ff23bc 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 = '1.0.324';
-PDFJS.build = 'd487d42';
+PDFJS.version = '1.0.326';
+PDFJS.build = '36c0c64';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/package.json b/package.json
index c47a54dc4..f8679b365 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.324",
+  "version": "1.0.326",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",