diff --git a/src/Main.gd b/src/Main.gd
index ccb44c20a..ebc75db5b 100644
--- a/src/Main.gd
+++ b/src/Main.gd
@@ -407,7 +407,7 @@ func crop_image() -> void:
 			if used_rect != Rect2(0, 0, 0, 0):
 				break
 			else:
-				if layer[0].get_used_rect() != Rect2(0, 0, 0, 0):
+				if layer.image.get_used_rect() != Rect2(0, 0, 0, 0):
 					used_rect = layer.image.get_used_rect()
 
 		# Merge all layers with content