diff --git a/lib/modifiedAPI.js b/lib/modifiedAPI.js
index ac90112..1527e52 100644
--- a/lib/modifiedAPI.js
+++ b/lib/modifiedAPI.js
@@ -19,13 +19,17 @@
 	function getImageData(window, context){
 		var imageData;
 		var source;
-		if (context instanceof window.CanvasRenderingContext2D){
+		if ((context.canvas.width || 0) * (context.canvas.height || 0) === 0){
+			imageData  = new window.wrappedJSObject.ImageData(0, 0);
+			source  = new window.wrappedJSObject.ImageData(0, 0);
+		}
+		else if (context instanceof window.CanvasRenderingContext2D){
 			imageData = window.CanvasRenderingContext2D.prototype.getImageData.call(context, 0, 0, context.canvas.width, context.canvas.height);
 			source = imageData.data;
 		}
 		else {
-			var imageData  = new window.wrappedJSObject.ImageData(context.canvas.width, context.canvas.height);
-			var source = new Uint8Array(imageData.data.length);
+			imageData  = new window.wrappedJSObject.ImageData(context.canvas.width, context.canvas.height);
+			source = new Uint8Array(imageData.data.length);
 			window.WebGLRenderingContext.prototype.readPixels.call(
 				context,
 				0, 0, context.canvas.width, context.canvas.height,
diff --git a/releaseNotes.txt b/releaseNotes.txt
index 86c3da2..9757857 100644
--- a/releaseNotes.txt
+++ b/releaseNotes.txt
@@ -6,7 +6,7 @@ Version 0.3.8:
 		- 
 	
 	fixes:
-		- 
+		- prevented error when canvas has size zero
 
 Version 0.3.7:
 	new features: