diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 57ff7da31b..c58dc1fd78 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,8 @@
+2002-11-24  Nick Clifton  <nickc@redhat.com>
+
+	* make-relative-prefix.c (make_relative_prefix): Ensure return
+	string is empty before using strcat to construct it.
+
 2002-11-22  Daniel Jacobowitz  <drow@mvista.com>
 
 	* Makefile.in: Add make-relative-prefix.c.
diff --git a/libiberty/make-relative-prefix.c b/libiberty/make-relative-prefix.c
index ae1ac54295..ef9177e9c9 100644
--- a/libiberty/make-relative-prefix.c
+++ b/libiberty/make-relative-prefix.c
@@ -362,6 +362,7 @@ make_relative_prefix (progname, bin_prefix, prefix)
     return NULL;
 
   /* Build up the pathnames in argv[0].  */
+  *ret = '\0';
   for (i = 0; i < prog_num; i++)
     strcat (ret, prog_dirs[i]);