diff --git a/codec-cfg.c b/codec-cfg.c
index fb6cbfcc91..97c9f1e86d 100644
--- a/codec-cfg.c
+++ b/codec-cfg.c
@@ -256,6 +256,7 @@ static short get_driver(char *s,int audioflag)
 		"mpng",
 		"ijpg",
 		"huffyuv",
+		"zlib",
 		NULL
 	};
         char **drv=audioflag?audiodrv:videodrv;
diff --git a/codec-cfg.h b/codec-cfg.h
index d701ddc331..0469acba4d 100644
--- a/codec-cfg.h
+++ b/codec-cfg.h
@@ -66,6 +66,7 @@
 #define VFM_MPNG 21
 #define VFM_IJPG 22
 #define VFM_HUFFYUV 23
+#define VFM_ZLIB 24
 
 #ifndef GUID_TYPE
 #define GUID_TYPE