diff --git a/ext/dbm/dbm.c b/ext/dbm/dbm.c
index 830a616804..55c60bf3b3 100644
--- a/ext/dbm/dbm.c
+++ b/ext/dbm/dbm.c
@@ -83,7 +83,6 @@ fdbm_s_open(argc, argv, klass)
     }
 
     if (!dbm) {
-	printf("mode: %o\n", mode);
 	if (mode == -1) return Qnil;
 	rb_sys_fail(RSTRING(file)->ptr);
     }