diff --git a/clang/include/clang/Basic/DiagnosticGroups.td b/clang/include/clang/Basic/DiagnosticGroups.td
index 0901636335e5..63afc632859c 100644
--- a/clang/include/clang/Basic/DiagnosticGroups.td
+++ b/clang/include/clang/Basic/DiagnosticGroups.td
@@ -26,7 +26,6 @@ def : DiagGroup<"bad-function-cast">;
 def : DiagGroup<"cast-align">;
 def : DiagGroup<"cast-qual">;
 def : DiagGroup<"char-align">;
-def : DiagGroup<"char-subscripts">;
 def Comment : DiagGroup<"comment">;
 def : DiagGroup<"conversion">;
 def : DiagGroup<"declaration-after-statement">;