diff --git a/scripts/bootstrap.sh b/scripts/bootstrap.sh
index 99d8dab687d5f8..00d31760afa40a 100644
--- a/scripts/bootstrap.sh
+++ b/scripts/bootstrap.sh
@@ -203,7 +203,9 @@ selectCXX()
 
     if [ "x$CXX" = "x" ]; then
         CXX=g++
-        if which g++-8 >/dev/null 2>&1; then
+        if which g++-9 >/dev/null 2>&1; then
+            CXX=g++-9
+        elif which g++-8 >/dev/null 2>&1; then
             CXX=g++-8
         elif which g++-7 >/dev/null 2>&1; then
             CXX=g++-7