diff --git a/src/mv.c b/src/mv.c
index a1d657d1e..a04f1028c 100644
--- a/src/mv.c
+++ b/src/mv.c
@@ -55,7 +55,7 @@
 uid_t geteuid ();
 #endif
 
-char *basename (char *);
+char *basename ();
 enum backup_type get_version ();
 int isdir ();
 int yesno ();
diff --git a/src/rm.c b/src/rm.c
index e8f99cc83..3b7754e60 100644
--- a/src/rm.c
+++ b/src/rm.c
@@ -43,7 +43,7 @@ struct pathstack
   ino_t inum;
 };
 
-char *basename (char *);
+char *basename ();
 char *stpcpy ();
 char *xmalloc ();
 char *xrealloc ();