diff --git a/install.sh b/install.sh
index ca8402ee8..734f3c41b 100644
--- a/install.sh
+++ b/install.sh
@@ -43,7 +43,14 @@ echo "It will take a long time, just be patient!"
 echo "If error,you need to compile it yourself"
 echo "cd $CURRENT_DIR/bundle/YouCompleteMe/ && bash -x install.sh --clang-completer"
 cd $CURRENT_DIR/bundle/YouCompleteMe/
-bash -x install.sh --clang-completer
+
+if [ `which clang` ]   # check system clang
+then
+    bash -x install.sh --clang-completer --system-libclang   # use system clang
+else
+    bash -x install.sh --clang-completer
+fi
+
 
 #vim bk and undo dir
 if [ ! -d /tmp/vimbk ]