diff --git a/honoka/plugins/wordsprediction.cpp b/honoka/plugins/wordsprediction.cpp
index 97289b0..bf3fbb3 100644
--- a/honoka/plugins/wordsprediction.cpp
+++ b/honoka/plugins/wordsprediction.cpp
@@ -62,9 +62,10 @@
     WideString word,prewords;
     for(unsigned int i = str.length();i > 0;i --) {
         //if (isalnum(utf8_wcstombs(str).c_str()[i - 1]))
-        if (((str[i - 1] >= 0x0041) && (str[i - 1] <= 0x005A)) ||
-            ((str[i - 1] >= 0x0061) && (str[i - 1] <= 0x007A)) ||
-            ((str[i - 1] >= 0x0030) && (str[i - 1] <= 0x0039)))
+        if (((str[i - 1] >= 0x0041) && (str[i - 1] <= 0x005A)) ||   // ��ʸ��
+            ((str[i - 1] >= 0x0061) && (str[i - 1] <= 0x007A)) ||   // ��ʸ��
+            ((str[i - 1] >= 0x0030) && (str[i - 1] <= 0x0039)) ||   // ����
+            (str[i - 1] == 0x002D))                                 // �ϥ��ե�
             word = str[i - 1] + word;
         else break;
     }