diff --git a/js/CanvasRenderer.js b/js/CanvasRenderer.js
index 1bebc6f..38938e4 100644
--- a/js/CanvasRenderer.js
+++ b/js/CanvasRenderer.js
@@ -652,8 +652,8 @@ export class CanvasRenderer {
         this.updateStrokeOverlaySize();
         // Position above main canvas but below cursor overlay
         this.strokeOverlayCanvas.style.position = 'absolute';
-        this.strokeOverlayCanvas.style.left = '0px';
-        this.strokeOverlayCanvas.style.top = '0px';
+        this.strokeOverlayCanvas.style.left = '1px';
+        this.strokeOverlayCanvas.style.top = '1px';
         this.strokeOverlayCanvas.style.pointerEvents = 'none';
         this.strokeOverlayCanvas.style.zIndex = '19'; // Below cursor overlay (20)
         // Opacity is now controlled by MaskTool.previewOpacity
diff --git a/src/CanvasRenderer.ts b/src/CanvasRenderer.ts
index 59b2af2..0c6a368 100644
--- a/src/CanvasRenderer.ts
+++ b/src/CanvasRenderer.ts
@@ -796,8 +796,8 @@ export class CanvasRenderer {
 
         // Position above main canvas but below cursor overlay
         this.strokeOverlayCanvas.style.position = 'absolute';
-        this.strokeOverlayCanvas.style.left = '0px';
-        this.strokeOverlayCanvas.style.top = '0px';
+        this.strokeOverlayCanvas.style.left = '1px';
+        this.strokeOverlayCanvas.style.top = '1px';
         this.strokeOverlayCanvas.style.pointerEvents = 'none';
         this.strokeOverlayCanvas.style.zIndex = '19'; // Below cursor overlay (20)
         // Opacity is now controlled by MaskTool.previewOpacity