diff --git a/lib/gss_preauth/Makefile.am b/lib/gss_preauth/Makefile.am
index 4484c7cbd..65031194e 100644
--- a/lib/gss_preauth/Makefile.am
+++ b/lib/gss_preauth/Makefile.am
@@ -16,6 +16,8 @@ libgss_preauth_la_SOURCES = pa_client.c pa_common.c
 
 ALL_OBJECTS = $(include_HEADERS) $(libgss_preauth_la_OBJECTS)
 
+$(libgss_preauth_la_OBJECTS): $(include_HEADERS)
+
 $(srcdir)/gss-preauth-protos.h: $(libgss_preauth_la_SOURCES)
 	cd $(srcdir); perl ../../cf/make-proto.pl -q -P comment -o gss-preauth-protos.h $(libgss_preauth_la_SOURCES) || rm -f gss-preauth-protos.h