diff --git a/Contrib/System/Source/System.c b/Contrib/System/Source/System.c
index e983c379..53a3f76a 100644
--- a/Contrib/System/Source/System.c
+++ b/Contrib/System/Source/System.c
@@ -520,6 +520,8 @@ SystemProc *PrepareProc(BOOL NeedForCall)
             case 'I': temp2 = PAT_INT; break;
             case 'l':
             case 'L': temp2 = PAT_LONG; break;
+            case 'm':
+            case 'M':
             case 't':
             case 'T': temp2 = PAT_STRING; break;
             case 'g':
diff --git a/Contrib/System/System.html b/Contrib/System/System.html
index 966c1d0f..990cf818 100644
--- a/Contrib/System/System.html
+++ b/Contrib/System/System.html
@@ -247,8 +247,12 @@ DetailPrint $4
 <td>large integer, int64</td>
 </tr>
 <tr>
+<th>m</th>
+<td>ANSI text, string. (FYI: 'm' for multibyte string or 'w' flipped over.)</td>
+</tr>
+<tr>
 <th>t</th>
-<td>text, string (pointer to first character)</td>
+<td>text, string (pointer to first character). <i>Like TCHAR*, it is a Unicode string in Unicode NSIS.</i></td>
 </tr>
 <tr>
 <th>w</th>
@@ -785,4 +789,4 @@ DetailPrint "Free virtual: $9 bytes"
 </div>
 
 </body>
-</html>
\ No newline at end of file
+</html>