JavaScriptCollection
diff --git a/‎jspdf.plugin.addimage.js‎
Lines changed: 2 additions & 2 deletions b/‎jspdf.plugin.addimage.js‎
Lines changed: 2 additions & 2 deletions
@@ -140,8 +140,8 @@ var getJpegSize = function(imgData) {
 
 jsPDFAPI.addImage = function(imageData, format, x, y, w, h) {
 	'use strict'
-	if(imageData.substr(11,4).indexOf('jpeg') < 0){
-		imageData = imageData.substr(0,15).replace('jpg','jpeg')+imageData.substr(15);
+	if(typeof imageData === 'string' && imageData.substr(0,14) === 'data:image/jpg') {
+		imageData = imageData.replace('data:image/jpg','data:image/jpeg');
 	}
 	if (typeof imageData === 'object' && imageData.nodeType === 1) {
         var canvas = document.createElement('canvas');