diff --git a/xtrn/sbj/sbj b/xtrn/sbj/sbj
index f6dbb740c944cffcee3b13dd2f770f22386d0c73..b546c5adc93484e0c841c0346d8bc6cb82e49d47 100755
--- a/xtrn/sbj/sbj
+++ b/xtrn/sbj/sbj
@@ -1,5 +1,6 @@
 #!/bin/sh
 os=`uname | tr "[A-Z]" "[a-z]"`
+if [ `arch` = x86_64 ]; then os=$os.x64; fi
 exename=`basename $0`
 dirname=`dirname $0`
 if [ -x $dirname\/gcc.$os.exe.release/$exename ]