diff --git a/.gitignore b/.gitignore
index be6c5635d6..763c0f9444 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,7 +42,9 @@ version.c
 
 Makefile
 !/contrib/slapd-modules/*/Makefile
+!/contrib/slapd-modules/*/*/Makefile
 !/doc/guide/admin/Makefile
+!/libraries/libmdb/Makefile
 !/servers/slapd/back-sql/rdbms_depend/timesten/dnreverse/Makefile
 
 /config.status
@@ -200,4 +202,3 @@ tests/schema
 tests/testdata
 tests/testrun
 tests/run
-