diff --git a/ChangeLog b/ChangeLog
index 47537b6d4e..6f0c33da37 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed Jul 18 23:04:18 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* ext/dbm/dbm.c (fdbm_empty_p): fix wrong condtion introduced in r36438.
+
+	* ext/sdbm/init.c (fsdbm_empty_p): ditto.
+
 Wed Jul 18 23:08:57 2012  Tanaka Akira  <akr@fsij.org>
 
 	* test/ruby/test_beginendblock.rb: remove temporally files early.
diff --git a/ext/dbm/dbm.c b/ext/dbm/dbm.c
index 8f50e32192..d41906aa74 100644
--- a/ext/dbm/dbm.c
+++ b/ext/dbm/dbm.c
@@ -699,7 +699,7 @@ fdbm_empty_p(VALUE obj)
 	}
     }
     else {
-	if (!dbmp->di_size)
+	if (dbmp->di_size)
 	    return Qfalse;
     }
     return Qtrue;
diff --git a/ext/sdbm/init.c b/ext/sdbm/init.c
index 1795024ff9..0fd837db31 100644
--- a/ext/sdbm/init.c
+++ b/ext/sdbm/init.c
@@ -724,7 +724,7 @@ fsdbm_empty_p(VALUE obj)
 	}
     }
     else {
-	if (!dbmp->di_size)
+	if (dbmp->di_size)
 	    return Qfalse;
     }
     return Qtrue;