diff --git a/configure b/configure
index 7257489152..97ba7a5f4e 100755
--- a/configure
+++ b/configure
@@ -1358,7 +1358,7 @@ if test "${with_ldbm_api+set}" = set; then
   withval="$with_ldbm_api"
   
 	ol_arg=invalid
-	for ol_val in auto db2 db gdbm ndbm manual ; do
+	for ol_val in auto db2 db mdbm gdbm ndbm manual ; do
 		if test "$withval" = "$ol_val" ; then
 			ol_arg="$ol_val"
 		fi