diff --git a/clang/include/clang/AST/TypeLoc.h b/clang/include/clang/AST/TypeLoc.h
index 72ed3cb752e0f..8bf64dc6158c3 100644
--- a/clang/include/clang/AST/TypeLoc.h
+++ b/clang/include/clang/AST/TypeLoc.h
@@ -2102,7 +2102,7 @@ struct AutoTypeLocInfo : TypeSpecLocInfo {
   NestedNameSpecifierLoc NestedNameSpec;
   SourceLocation TemplateKWLoc;
   SourceLocation ConceptNameLoc;
-  NamedDecl *FoundDecl;
+  NamedDecl *FoundDecl = nullptr;
   SourceLocation LAngleLoc;
   SourceLocation RAngleLoc;