diff --git a/src/blitter/8bpp_optimized.cpp b/src/blitter/8bpp_optimized.cpp
--- a/src/blitter/8bpp_optimized.cpp
+++ b/src/blitter/8bpp_optimized.cpp
@@ -13,6 +13,7 @@
 #include "../zoom_func.h"
 #include "../settings_type.h"
 #include "../core/math_func.hpp"
+#include "../core/mem_func.hpp"
 #include "8bpp_optimized.hpp"
 
 #include "../safeguards.h"
@@ -96,6 +97,11 @@ void Blitter_8bppOptimized::Draw(Blitter
 					break;
 				}
 
+				case BM_BLACK_REMAP:
+					MemSetT(dst, 0, pixels);
+					dst += pixels;
+					break;
+
 				case BM_TRANSPARENT: {
 					const uint8 *remap = bp->remap;
 					src += pixels;
@@ -107,7 +113,7 @@ void Blitter_8bppOptimized::Draw(Blitter
 				}
 
 				default:
-					memcpy(dst, src, pixels);
+					MemCpyT(dst, src, pixels);
 					dst += pixels; src += pixels;
 					break;
 			}