diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index da2bec38e8ed..f64970473ff3 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -3997,12 +3997,10 @@ static bool CheckAnonMemberRedeclaration(Sema &SemaRef,
 ///
 /// This routine is recursive, injecting the names of nested anonymous
 /// structs/unions into the owning context and scope as well.
-static bool InjectAnonymousStructOrUnionMembers(Sema &SemaRef, Scope *S,
-                                         DeclContext *Owner,
-                                         RecordDecl *AnonRecord,
-                                         AccessSpecifier AS,
-                                         SmallVectorImpl<NamedDecl *> &Chaining,
-                                         bool MSAnonStruct) {
+static bool
+InjectAnonymousStructOrUnionMembers(Sema &SemaRef, Scope *S, DeclContext *Owner,
+                                    RecordDecl *AnonRecord, AccessSpecifier AS,
+                                    SmallVectorImpl<NamedDecl *> &Chaining) {
   bool Invalid = false;
 
   // Look every FieldDecl and IndirectFieldDecl with a name.
@@ -4345,8 +4343,7 @@ Decl *Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS,
   SmallVector<NamedDecl*, 2> Chain;
   Chain.push_back(Anon);
 
-  if (InjectAnonymousStructOrUnionMembers(*this, S, Owner, Record, AS,
-                                          Chain, false))
+  if (InjectAnonymousStructOrUnionMembers(*this, S, Owner, Record, AS, Chain))
     Invalid = true;
 
   if (VarDecl *NewVD = dyn_cast<VarDecl>(Anon)) {
@@ -4418,7 +4415,7 @@ Decl *Sema::BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS,
   if (RequireCompleteType(Anon->getLocation(), RecTy,
                           diag::err_field_incomplete) ||
       InjectAnonymousStructOrUnionMembers(*this, S, CurContext, RecordDef,
-                                          AS_none, Chain, true)) {
+                                          AS_none, Chain)) {
     Anon->setInvalidDecl();
     ParentDecl->setInvalidDecl();
   }