diff --git a/src/blitter/32bpp_base.cpp b/src/blitter/32bpp_base.cpp
--- a/src/blitter/32bpp_base.cpp
+++ b/src/blitter/32bpp_base.cpp
@@ -22,12 +22,6 @@ void Blitter_32bppBase::SetPixel(void *v
 	*((uint32 *)video + x + y * _screen.pitch) = LookupColourInPalette(colour);
 }
 
-void Blitter_32bppBase::SetPixelIfEmpty(void *video, int x, int y, uint8 colour)
-{
-	uint32 *dst = (uint32 *)video + x + y * _screen.pitch;
-	if (*dst == 0) *dst = LookupColourInPalette(colour);
-}
-
 void Blitter_32bppBase::DrawRect(void *video, int width, int height, uint8 colour)
 {
 	uint32 colour32 = LookupColourInPalette(colour);