diff --git a/honoka/plugins/nicolainput.cpp b/honoka/plugins/nicolainput.cpp
index 2c1ada8..1c02b52 100644
--- a/honoka/plugins/nicolainput.cpp
+++ b/honoka/plugins/nicolainput.cpp
@@ -40,6 +40,7 @@
 // �ץ饤�����󲽤Τ��ޤ��ʤ��Ǥ���
 HonokaPluginRegister(NicolaInput);
 
+namespace Honoka {
 struct {
     KeyCode key;
     char noShift[6];
@@ -101,6 +102,8 @@
 
     {SCIM_KEY_NullKey,"","",""} // terminator
 };
+}
+
 
 NicolaInput::NicolaInput(ConfigPointer cfg) : PreEditor(cfg)
 {