--- mod_auth_kerb-5.4/src/mod_auth_kerb.c	2010-10-04 16:21:22.169285716 +0200
+++ mod_auth_kerb-5.4.new/src/mod_auth_kerb.c	2010-10-04 16:20:41.584250095 +0200
@@ -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>