diff --git a/libcxx/lib/buildit b/libcxx/lib/buildit
index 00f0adfe91f0..7e42c1bd9155 100755
--- a/libcxx/lib/buildit
+++ b/libcxx/lib/buildit
@@ -19,7 +19,7 @@ fi
 
 if [ -z "$CXX_LANG" ]
 then
-    CXX_LANG=c++1y
+    CXX_LANG=c++11
 fi
 
 if [ -z "$CC" ]
diff --git a/libcxx/test/testit b/libcxx/test/testit
index beb07a2a6951..096627f69fc2 100755
--- a/libcxx/test/testit
+++ b/libcxx/test/testit
@@ -38,7 +38,7 @@ fi
 
 if [ -z "$CXX_LANG" ]
 then
-    CXX_LANG=c++1y
+    CXX_LANG=c++11
 fi
 if [ -z "$OPTIONS" ]
 then