diff --git a/lib/gssapi/Makefile.am b/lib/gssapi/Makefile.am
index 9053a9348..a0c5b4058 100644
--- a/lib/gssapi/Makefile.am
+++ b/lib/gssapi/Makefile.am
@@ -171,7 +171,8 @@ ntlmsrc = \
 	ntlm/inquire_names_for_mech.c \
 	ntlm/process_context_token.c \
 	ntlm/release_cred.c \
-	ntlm/release_name.c
+	ntlm/release_name.c \
+	ntlm/digest.c
 
 $(srcdir)/ntlm/ntlm-private.h:
 	cd $(srcdir) && perl ../../cf/make-proto.pl -q -P comment -p ntlm/ntlm-private.h $(ntlmsrc) || rm -f ntlm/ntlm-private.h