diff --git a/src/playdate/graphics.nim b/src/playdate/graphics.nim
index 5691420..76f877f 100644
--- a/src/playdate/graphics.nim
+++ b/src/playdate/graphics.nim
@@ -411,9 +411,12 @@ proc set*(this: var LCDBitmap, x, y: int, color: LCDSolidColor = kColorBlack) =
         var data = this.getData
         data.set(x, y, color)
 
-proc setStencilImage*(this: ptr PlaydateGraphics, bitmap: LCDBitmap, tile: bool) =
+proc setStencilImage*(this: ptr PlaydateGraphics, bitmap: LCDBitmap, tile: bool = false) =
     privateAccess(PlaydateGraphics)
-    this.setStencilImage(bitmap.resource, if tile: 1 else: 0)
+    if bitmap == nil:
+        this.setStencilImage(nil, if tile: 1 else: 0)
+    else:
+        this.setStencilImage(bitmap.resource, if tile: 1 else: 0)
 
 proc makeFont*(this: LCDFontData, wide: bool): LCDFont =
     privateAccess(PlaydateGraphics)