diff --git a/Toolchain/BuildIt.sh b/Toolchain/BuildIt.sh
index 0e308b4922..c5a22fd67a 100755
--- a/Toolchain/BuildIt.sh
+++ b/Toolchain/BuildIt.sh
@@ -254,7 +254,7 @@ pushd "$DIR/Build/"
         popd
 
         echo "XXX build libstdc++"
-        "$MAKE" all-target-libstdc++-v3 || exit 1
+        "$MAKE" -j "$MAKEJOBS" all-target-libstdc++-v3 || exit 1
         echo "XXX install libstdc++"
         "$MAKE" install-target-libstdc++-v3 || exit 1