diff --git a/honoka/plugins/skkdic.cpp b/honoka/plugins/skkdic.cpp
index 197023a..6fffbfd 100644
--- a/honoka/plugins/skkdic.cpp
+++ b/honoka/plugins/skkdic.cpp
@@ -20,6 +20,9 @@
 
 #include "skkdic.h"
 
+using namespace Honoka;
+
+
 SKKDic::SKKDic(String file)
 {
     filename = file;
diff --git a/honoka/plugins/skkdic.h b/honoka/plugins/skkdic.h
index 1cfb406..beaed5d 100644
--- a/honoka/plugins/skkdic.h
+++ b/honoka/plugins/skkdic.h
@@ -38,6 +38,7 @@
 /**
 @author TAM (Teppei Tamra)
 */
+namespace Honoka {
 class SKKDicEntryData {
 public:
     WideString annotation;
@@ -67,4 +68,6 @@
     void init();
     vector<WideString> parser(const WideString data);
 };
+}
+
 #endif