diff --git a/scim-wnn/src/scim_wnn_imengine.cpp b/scim-wnn/src/scim_wnn_imengine.cpp
index 52d1175..6c4c409 100644
--- a/scim-wnn/src/scim_wnn_imengine.cpp
+++ b/scim-wnn/src/scim_wnn_imengine.cpp
@@ -454,9 +454,9 @@
         m_preeditor->reset();
         wnn.reset();
         m_conversion = false;
-        hide_preedit_string();
         hide_lookup_table();
         hide_aux_string();
+        updatePreEditor();
         m_lookup = false;
         alp_count = 1;
         return(true);
@@ -636,19 +636,17 @@
     if (m_conversion) {
         commit_string(wnn.getText());
         wnn.updateFrequency();
-        m_preeditor->reset();
         wnn.reset();
         m_conversion = false;
-        hide_preedit_string();
         hide_lookup_table();
         hide_aux_string();
         m_lookup = false;
         alp_count = 0;
     } else if (m_preeditor->getTextLength()) {
         commit_string(m_preeditor->getText(true));
-        m_preeditor->reset();
-        hide_preedit_string();
     }
+    m_preeditor->reset();
+    updatePreEditor();
 }
 
 void WnnInstance::trigger_property (const String &property)