diff --git a/platforms/unix/vm-display-X11/sqUnixX11.c b/platforms/unix/vm-display-X11/sqUnixX11.c
index dc7136d141..2c6c817830 100644
--- a/platforms/unix/vm-display-X11/sqUnixX11.c
+++ b/platforms/unix/vm-display-X11/sqUnixX11.c
@@ -1955,6 +1955,7 @@ static int x2sqKeyPlain(XKeyEvent *xevt, KeySym *symbolic)
       return -1;	/* unknown key */
   if ((charCode == 127) && mapDelBs)
     charCode= 8;
+#ifdef PharoVM
   if (charCode >= 1 && charCode <= 26) {
     /* check for Ctrl-letter that gets translated into charCode 1-26 instead of letters a-z */
     KeySym keysym = *symbolic;
@@ -1963,6 +1964,7 @@ static int x2sqKeyPlain(XKeyEvent *xevt, KeySym *symbolic)
     if (keysym >= XK_A && keysym <= XK_Z)
       return (int)'A' + (keysym - XK_A);
   }
+#endif
   return charCode;
 }