diff -Nur hal-0.5.7.1-orig/hald/linux2/hotplug.c hal-0.5.7.1/hald/linux2/hotplug.c
--- hal-0.5.7.1-orig/hald/linux2/hotplug.c	2007-01-30 14:39:33.000000000 -0500
+++ hal-0.5.7.1/hald/linux2/hotplug.c	2007-01-30 14:39:52.000000000 -0500
@@ -28,6 +28,7 @@
 #endif
 
 #include <stdio.h>
+#include <ctype.h>
 #include <string.h>
 #include <mntent.h>
 #include <errno.h>