diff --git a/lib/modifiedCanvasAPI.js b/lib/modifiedCanvasAPI.js
index 6dd6ed1..ad3b06c 100644
--- a/lib/modifiedCanvasAPI.js
+++ b/lib/modifiedCanvasAPI.js
@@ -427,7 +427,7 @@
 							return getIsPointValue({
 								func: (x, y) => original.call(this, x, y, args[2]),
 								x, y,
-								index: x + this.width * y,
+								index: x + this.canvas.width * y,
 								originalValue, window, prefs
 							});
 						}
@@ -462,7 +462,7 @@
 							return getIsPointValue({
 								func,
 								x, y,
-								index: x + this.width * y,
+								index: x + this.canvas.width * y,
 								originalValue, window, prefs
 							});
 						}
diff --git a/releaseNotes.txt b/releaseNotes.txt
index 5a23371..be75e45 100644
--- a/releaseNotes.txt
+++ b/releaseNotes.txt
@@ -6,7 +6,7 @@ Version 1.10.1:
 		- 
 	
 	fixes:
-		- 
+		- isPointInPath and isPointInStroke return undefined with persistent rng
 	
 	known issues:
 		- if a data URL is blocked the page action button does not appear