diff --git a/ibus-m17n.spec b/ibus-m17n.spec
index 2589ae5..aa1103c 100644
--- a/ibus-m17n.spec
+++ b/ibus-m17n.spec
@@ -19,6 +19,8 @@ License:    GPLv2+
 Group:      System Environment/Libraries
 URL:        http://code.google.com/p/ibus/
 Source0:    http://ibus.googlecode.com/files/%{name}-%{version}.tar.gz
+# dummy source to keep quilt series file
+Source1:    series
 
 Patch0:     ibus-m17n-HEAD.patch
 Patch1:     ibus-m17n-iok.patch