diff --git a/skybreak b/skybreak
index 0c4f9d955d..c2b9cae8ab 100755
--- a/skybreak
+++ b/skybreak
@@ -18,7 +18,7 @@ if [ "$UNAME" != "Linux" -a "$UNAME" != "Darwin" ] ; then
 fi
 
 if [ "$UNAME" = "Darwin" ] ; then
-  if [ "i386" != $(uname -p) -o "1" != $(sysctl -n hw.cpu64bit_capable) ] ; then
+  if [ "i386" != $(uname -p) -o "1" != $(sysctl -n hw.cpu64bit_capable 2>/dev/null || echo 0) ] ; then
 
     # Can't just test uname -m = x86_64, because Snow Leopard can
     # return other values.