diff --git a/lib/hdb/NTMakefile b/lib/hdb/NTMakefile
index be25df70a..01671b078 100644
--- a/lib/hdb/NTMakefile
+++ b/lib/hdb/NTMakefile
@@ -73,6 +73,7 @@ dist_libhdb_la_SOURCES =			\
 	hdb-sqlite.c				\
 	hdb-keytab.c				\
 	hdb-mitdb.c				\
+	hdb-mdb.c				\
 	hdb_locl.h				\
 	keys.c					\
 	keytab.c				\