diff --git a/libguile/scm_validate.h b/libguile/scm_validate.h
index 7c9e303c8..d1279b95d 100644
--- a/libguile/scm_validate.h
+++ b/libguile/scm_validate.h
@@ -1,4 +1,4 @@
-/* $Id: scm_validate.h,v 1.10 2000-01-05 19:00:02 gjb Exp $ */
+/* $Id: scm_validate.h,v 1.11 2000-01-06 18:02:16 gjb Exp $ */
 /*	Copyright (C) 1999 Free Software Foundation, Inc.
  * 
  * This program is free software; you can redistribute it and/or modify
@@ -107,11 +107,11 @@
 #define SCM_VALIDATE_ROSTRING(pos,str) SCM_MAKE_VALIDATE(pos,str,ROSTRINGP)
 
 #define SCM_VALIDATE_ROSTRING_COPY(pos,str,cvar) \
-  do { SCM_ASSERT(SCM_NIMP (str) && SCM_ROSTRINGP (str), str, pos, FUNC_NAME); \
+  do { SCM_ASSERT(SCM_ROSTRINGP (str), str, pos, FUNC_NAME); \
        cvar = SCM_ROCHARS(str); } while (0)
 
 #define SCM_VALIDATE_NULLORROSTRING_COPY(pos,str,cvar) \
-  do { SCM_ASSERT(SCM_FALSEP(str) || (SCM_NIMP (str) && SCM_ROSTRINGP (str)), str, pos, FUNC_NAME); \
+  do { SCM_ASSERT(SCM_FALSEP(str) || SCM_ROSTRINGP (str), str, pos, FUNC_NAME); \
        if (SCM_FALSEP(str)) cvar = NULL; else cvar = SCM_ROCHARS(str); } while (0)
 
 #define SCM_VALIDATE_STRING(pos,str) SCM_MAKE_VALIDATE(pos,str,STRINGP)