diff --git a/ChangeLog b/ChangeLog
index 1fdf29940f..0538a89f91 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Feb 17 21:39:36 2012  Tanaka Akira  <akr@fsij.org>
+
+	* ext/dbm/extconf.rb: remove dbm.
+
 Fri Feb 17 21:18:39 2012  Tanaka Akira  <akr@fsij.org>
 
 	* ext/dbm/extconf.rb: refine header/libraty mismatch detection.
diff --git a/ext/dbm/extconf.rb b/ext/dbm/extconf.rb
index e2ffc2b3ed..5dc4fb7878 100644
--- a/ext/dbm/extconf.rb
+++ b/ext/dbm/extconf.rb
@@ -5,7 +5,7 @@ dir_config("dbm")
 if dblib = with_config("dbm-type", nil)
   dblib = dblib.split(/[ ,]+/)
 else
-  dblib = %w(libc db db2 db1 db5 db4 db3 dbm gdbm gdbm_compat qdbm)
+  dblib = %w(libc db db2 db1 db5 db4 db3 gdbm gdbm_compat qdbm)
 end
 
 headers = {