diff --git a/BuildLinux.sh b/BuildLinux.sh
index 44ed284427..382bdac733 100755
--- a/BuildLinux.sh
+++ b/BuildLinux.sh
@@ -49,7 +49,7 @@ while getopts ":1j:bcdghirsu" opt; do
         export CMAKE_BUILD_PARALLEL_LEVEL=1
         ;;
     j )
-        CMAKE_BUILD_PARALLEL_LEVEL=$OPTARG
+        export CMAKE_BUILD_PARALLEL_LEVEL=$OPTARG
         ;;
     b )
         BUILD_DEBUG="1"