--- mod_auth_kerb-5.4/src/mod_auth_kerb.c	2008-12-04 03:14:03.000000000 -0700
+++ mod_auth_kerb-5.4a/src/mod_auth_kerb.c	2011-01-25 17:35:31.466666669 -0700
@@ -89,6 +89,7 @@
 #include <krb5.h>
 #ifdef HEIMDAL
 #  include <gssapi.h>
+#  include <gssapi/gssapi_krb5.h>
 #else
 #  include <gssapi/gssapi.h>
 #  include <gssapi/gssapi_generic.h>
