diff --git a/server/xml.cpp b/server/xml.cpp
index 4464b37b9..2ef62e7f5 100755
--- a/server/xml.cpp
+++ b/server/xml.cpp
@@ -311,7 +311,7 @@ int TXmlItem::ReadTag(wxInputStream& inf)
 			break;
 		// Leggo il valore dell'attributo
 		str = GetWord(inf);
-    const int len = str.Len();
+    const size_t len = str.Len();
     if (len >= 2 && (str[0] == '"' || str[0] == '\'') && str[len-1] == str[0])
     {
 			str = str.Mid(1, len - 2);