diff --git a/pdf.js b/pdf.js
index dbceac9fe..ecb214360 100644
--- a/pdf.js
+++ b/pdf.js
@@ -2397,8 +2397,8 @@ var CanvasGraphics = (function() {
             var w = image.dict.get("Width");
             var h = image.dict.get("Height");
             var tmpCanvas = document.createElement("canvas");
-            tmpCanvas.height = w;
-            tmpCanvas.width = h;
+            tmpCanvas.width = w;
+            tmpCanvas.height = h;
             var tmpCtx = tmpCanvas.getContext("2d");
             var imgData = tmpCtx.getImageData(0, 0, w, h);
             var pixels = imgData.data;