diff --git a/ChangeLog b/ChangeLog
index 6c6a84ce4b..bd2d4cf116 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 Fri May 16 11:29:30 CEST 2008 Jim Meyering <meyering@redhat.com>
 
+	* src/xml.c: Include "c-ctype.h".
+
 	start using c-ctype functions
 	Up to now, we've been avoiding ctype functions like isspace, isdigit,
 	etc.  because they are locale-dependent.  Now that we have the c-ctype
diff --git a/src/xml.c b/src/xml.c
index 14b8b70a21..ec39a0a6dc 100644
--- a/src/xml.c
+++ b/src/xml.c
@@ -21,6 +21,7 @@
 #include <xs.h>
 #endif
 #include <math.h>               /* for isnan() */
+#include "c-ctype.h"
 #include "internal.h"
 #include "hash.h"
 #include "sexpr.h"