--- hatari/src/convert/spec640x16.c	2019/04/01 07:12:50	1.1.1.3
+++ hatari/src/convert/spec640x16.c	2019/04/01 07:13:19	1.1.1.4
@@ -157,7 +157,7 @@ static void ConvertSpec512_640x16Bit(voi
     Spec512_EndScanLine();
 
     /* Offset to next line: */
-    pPCScreenDest = (void *)(((unsigned char *)pPCScreenDest)+2*PCScreenBytesPerLine);
+    pPCScreenDest = (((Uint8 *)pPCScreenDest)+2*PCScreenBytesPerLine);
   }
 
   bScreenContentsChanged = TRUE;