--- mod_auth_kerb-5.4/src/mod_auth_kerb.c~	2008-12-04 11:14:03.000000000 +0100
+++ mod_auth_kerb-5.4/src/mod_auth_kerb.c	2009-12-09 15:17:55.226027574 +0100
@@ -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>