diff --git a/clang/lib/AST/ASTStructuralEquivalence.cpp b/clang/lib/AST/ASTStructuralEquivalence.cpp
index 8d9960b45627..499854a75abc 100644
--- a/clang/lib/AST/ASTStructuralEquivalence.cpp
+++ b/clang/lib/AST/ASTStructuralEquivalence.cpp
@@ -112,8 +112,6 @@ static bool IsStructurallyEquivalent(StructuralEquivalenceContext &Context,
 static bool IsStructurallyEquivalent(StructuralEquivalenceContext &Context,
                                      NestedNameSpecifier *NNS1,
                                      NestedNameSpecifier *NNS2);
-static bool IsStructurallyEquivalent(StructuralEquivalenceContext &Context,
-                                     const Attr *Attr1, const Attr *Attr2);
 static bool IsStructurallyEquivalent(const IdentifierInfo *Name1,
                                      const IdentifierInfo *Name2);