diff --git a/l10ntools/source/xrmlex.l b/l10ntools/source/xrmlex.l
index 41a19f279cf2..57d6e3e38b1c 100644
--- a/l10ntools/source/xrmlex.l
+++ b/l10ntools/source/xrmlex.l
@@ -134,7 +134,7 @@ static int bText=0;
 
 
 "<!--"  {
-    char c1 = 0, c2 = 0;
+    int c1 = 0, c2 = 0;
     int c3 = yyinput();
     char pChar[2];
     pChar[1] = 0x00;