diff --git a/cpp-style-and-conventions.md b/cpp-style-and-conventions.md
index be365ec..03f3167 100644
--- a/cpp-style-and-conventions.md
+++ b/cpp-style-and-conventions.md
@@ -248,6 +248,7 @@
 PointerAlignment: Left
 ReflowComments:  true
 SortIncludes:    true
+SortUsingDeclarations: true
 SpaceAfterCStyleCast: false
 SpaceBeforeAssignmentOperators: true
 SpaceBeforeParens: ControlStatements