1 files changed, 1 insertions, 1 deletions
diff --git a/gfx.h b/gfx.h
index c5c962315..1a2e436f1 100644
--- a/gfx.h
+++ b/gfx.h
@@ -76,7 +76,7 @@ void MarkWholeScreenDirty(void);
 
 void GfxInitPalettes(void);
 
-bool FillDrawPixelInfo(DrawPixelInfo *n, DrawPixelInfo *o, int left, int top, int width, int height);
+bool FillDrawPixelInfo(DrawPixelInfo* n, const DrawPixelInfo* o, int left, int top, int width, int height);
 
 /* window.c */
 void DrawOverlappedWindowForAll(int left, int top, int right, int bottom);