diff --git a/fcall.h b/fcall.h
index 4a0d6f2..d8ca20e 100644
--- a/fcall.h
+++ b/fcall.h
@@ -48,7 +48,7 @@ struct	Fcall
 #define	GBIT8(p)	((p)[0])
 #define	GBIT16(p)	((p)[0]|((p)[1]<<8))
 #define	GBIT32(p)	((p)[0]|((p)[1]<<8)|((p)[2]<<16)|((p)[3]<<24))
-#define	GBIT64(p)	((ulong)((p)[0]|((p)[1]<<8)|((p)[2]<<16)|((p)[3]<<24)) |\
+#define	GBIT64(p)	((u32int)((p)[0]|((p)[1]<<8)|((p)[2]<<16)|((p)[3]<<24)) |\
 				((vlong)((p)[4]|((p)[5]<<8)|((p)[6]<<16)|((p)[7]<<24)) << 32))
 
 #define	PBIT8(p,v)	(p)[0]=(v)