diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index b085addcfb16..30295c21d3e2 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,7 @@
+2004-01-15  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* strdup.c (strdup): Constify the argument.
+
 2004-01-14  Loren J. Rittle  <ljrittle@acm.org>
 
 	* Makefile.in (distclean): Remove config.cache.
diff --git a/libiberty/strdup.c b/libiberty/strdup.c
index 071a4a401af7..a3f17d3bcb1e 100644
--- a/libiberty/strdup.c
+++ b/libiberty/strdup.c
@@ -22,7 +22,7 @@ extern PTR	memcpy PARAMS ((PTR, const PTR, size_t));
 
 char *
 strdup(s)
-     char *s;
+     const char *s;
 {
   size_t len = strlen (s) + 1;
   char *result = (char*) malloc (len);