diff --git a/lib/isc/include/isc/sha1.h b/lib/isc/include/isc/sha1.h
index 5e5b8bc5c8..e23c0dd917 100644
--- a/lib/isc/include/isc/sha1.h
+++ b/lib/isc/include/isc/sha1.h
@@ -15,7 +15,7 @@
  * SOFTWARE.
  */
 
-/* $Id: sha1.h,v 1.2 2000/06/07 00:22:32 explorer Exp $ */
+/* $Id: sha1.h,v 1.3 2000/06/07 00:30:42 explorer Exp $ */
 
 /*	$NetBSD: sha1.h,v 1.2 1998/05/29 22:55:44 thorpej Exp $	*/
 
@@ -38,7 +38,8 @@ typedef struct {
   
 void isc_sha1_init(isc_sha1_t *ctx);
 void isc_sha1_invalidate(isc_sha1_t *ctx);
-void isc_sha1_update(isc_sha1_t *ctx, const unsigned char *data, u_int len);
+void isc_sha1_update(isc_sha1_t *ctx, const unsigned char *data,
+		     unsigned int len);
 void isc_sha1_final(isc_sha1_t *ctx, unsigned char digest[20]);
 
 #endif /* ISC_SHA1_H */