diff --git a/Source/init.cpp b/Source/init.cpp
index 47ccb862c..88fcd8e32 100644
--- a/Source/init.cpp
+++ b/Source/init.cpp
@@ -50,7 +50,7 @@ void init_create_window()
 	atexit(dx_cleanup);
 	gbActive = true;
 	gpBufStart = &gpBuffer[BUFFER_WIDTH * SCREEN_Y];
-	gpBufEnd = BUFFER_WIDTH * (SCREEN_HEIGHT + SCREEN_Y);
+	gpBufEnd = (BYTE *)(BUFFER_WIDTH * (SCREEN_HEIGHT + SCREEN_Y));
 	SDL_DisableScreenSaver();
 }