diff --git a/lib/intercept.js b/lib/intercept.js
index a20d754..b78bb08 100644
--- a/lib/intercept.js
+++ b/lib/intercept.js
@@ -56,7 +56,7 @@
 											setRandomSupplyByType(prefs("rng"));
 											var fake = changedFunction.fakeGenerator(prefs, function(messageId){
 												notify({url: window.location.href, errorStack: error.stack, messageId});
-											});
+											}, original);
 											switch (fake){
 												case true:
 													return original;
diff --git a/lib/modifiedAPI.js b/lib/modifiedAPI.js
index c0750e6..e7b2d43 100644
--- a/lib/modifiedAPI.js
+++ b/lib/modifiedAPI.js
@@ -187,13 +187,13 @@
 				return status;
 			},
 			object: "CanvasRenderingContext2D",
-			fakeGenerator: function(prefs, notify){
+			fakeGenerator: function(prefs, notify, original){
 				var maxSize = prefs("maxFakeSize") || Number.POSITIVE_INFINITY;
 				return function getImageData(sx, sy, sw, sh){
 					var window = getWindow(this.canvas);
 					var context;
 					if (sw * sh > maxSize){
-						context = this;
+						return original.call(this, sx, sy, sw, sh);
 					}
 					else {
 						notify("fakedReadout");
diff --git a/releaseNotes.txt b/releaseNotes.txt
index 7fa6488..2b776c4 100644
--- a/releaseNotes.txt
+++ b/releaseNotes.txt
@@ -1,3 +1,13 @@
+Version 0.3.5
+	changes:
+		- 
+	
+	new features:
+		- improved performance when canvas bigger than maxSize.
+	
+	fixes:
+		- 
+
 Version 0.3.4:
 	changes:
 		- different fake modes show independent notifications