1 files changed, 5 insertions, 0 deletions
diff --git a/clang/lib/AST/ODRHash.cpp b/clang/lib/AST/ODRHash.cpp
index 3b89c630b451..27fdca1c4b9c 100644
--- a/clang/lib/AST/ODRHash.cpp
+++ b/clang/lib/AST/ODRHash.cpp
@@ -380,6 +380,11 @@ public:
     }
     Hash.AddBoolean(D->isParameterPack());
 
+    const TypeConstraint *TC = D->getTypeConstraint();
+    Hash.AddBoolean(TC != nullptr);
+    if (TC)
+      AddStmt(TC->getImmediatelyDeclaredConstraint());
+
     Inherited::VisitTemplateTypeParmDecl(D);
   }