diff --git a/honoka/src/honoka_imengine.cpp b/honoka/src/honoka_imengine.cpp
index 6e593fd..5f46d97 100644
--- a/honoka/src/honoka_imengine.cpp
+++ b/honoka/src/honoka_imengine.cpp
@@ -715,21 +715,24 @@
 {
     // PreEdit���Υ������٥�ȡ�
     for(unsigned int i = 0;i < k_preeditor.size();i ++) {
-        if (k_preeditor[i].comp(key) && (preeditors[i] != m_preeditor)) {
+        if (k_preeditor[i].comp(key)) {
+            if (preeditors[i] == m_preeditor) return true;
             changePreEditor(preeditors[i]->getName());
             updatePreEditor();
             return true;
         }
     }
     for(unsigned int i = 0;i < k_convertor.size();i ++) {
-        if (k_convertor[i].comp(key) && (convertors[i] != m_convertor)) {
+        if (k_convertor[i].comp(key)) {
+            if (convertors[i] == m_convertor) return true;
             changeConvertor(convertors[i]->getName());
             updatePreEditor();
             return true;
         }
     }
     for(unsigned int i = 0;i < k_predictor.size();i ++) {
-        if (k_predictor[i].comp(key) && (predictors[i] != m_predictor)) {
+        if (k_predictor[i].comp(key)) {
+            if (predictors[i] == m_predictor) return true;
             m_predictor = predictors[i];
             updatePreEditor();
             return true;
@@ -1095,7 +1098,8 @@
     // ����ʸ��θ�������Ѵ����󥸥󤫤�������륭����
     if (m_convertor != m_multi) {
         for(unsigned int i = 0;i < k_convertor.size();i ++) {
-            if (k_convertor[i].comp(key) && (convertors[i] != m_convertor)) {
+            if (k_convertor[i].comp(key)) {
+                if (convertors[i] == m_convertor) return true;
                 if (!convertors[i]->isConnected())
                     if (!convertors[i]->connect()) return true;
                 m_no_update = true;
@@ -1107,7 +1111,7 @@
                 convertors[i]->reset();
                 startLookup();
                 updateConversion();
-                return(true);
+                return true;
             }
         }
     }