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-rw-r--r--ext/dbm/extconf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/dbm/extconf.rb b/ext/dbm/extconf.rb
index f6263f8f15..ea6a4a9118 100644
--- a/ext/dbm/extconf.rb
+++ b/ext/dbm/extconf.rb
@@ -182,7 +182,7 @@ def headers.db_check2(db, hdr)
# ndbm compatibility layer of gdbm.
# So, try to check header/library mismatch.
#
- if hdr == 'ndbm.h' && db != 'libc'
+ if hdr == 'ndbm.h' && db != 'libc' && db != 'ndbm'
if /\Adb\d?\z/ !~ db && have_db_header
return false
end