diff --git a/Libraries/LibGfx/Forward.h b/Libraries/LibGfx/Forward.h
index 2c03bc303d..c41c7bc21a 100644
--- a/Libraries/LibGfx/Forward.h
+++ b/Libraries/LibGfx/Forward.h
@@ -46,7 +46,7 @@ class Point;
 class Rect;
 class Size;
 class StylePainter;
-class SystemTheme;
+struct SystemTheme;
 class Triangle;
 
 enum class BitmapFormat;