diff --git a/tools/tools.sh b/tools/tools.sh
index 5e4c1aa..a09ec64 100644
--- a/tools/tools.sh
+++ b/tools/tools.sh
@@ -179,7 +179,7 @@ function verify_sdk_version()
   done
   if [ ! $sdk ] ; then
     echo cant find SDK for OSX $sdkv in tarballs. exiting
-    exit
+    exit 1
   fi
 }