diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 77f42efd808..de9309ccb7c 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,7 @@
+Wed Sep  8 20:03:28 1999  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* xmemdup.c: Include sys/types.h.
+
 1999-09-07  Jeff Garzik  <jgarzik@pobox.com>
 
 	* xmemdup.c: New xmemdup function.
diff --git a/libiberty/xmemdup.c b/libiberty/xmemdup.c
index 8e82469070c..f780041aa13 100644
--- a/libiberty/xmemdup.c
+++ b/libiberty/xmemdup.c
@@ -8,6 +8,8 @@
 #include "ansidecl.h"
 #include "libiberty.h"
 
+#include <sys/types.h> /* For size_t. */
+
 PTR
 xmemdup (input, copy_size, alloc_size)
   const PTR input;