diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -5636,14 +5636,17 @@
   // Look in the folding set for an existing type.
   void *InsertPos = nullptr;
   llvm::FoldingSetNodeID ID;
-  DeducedTemplateSpecializationType::Profile(ID, Template, DeducedType,
-                                             IsDependent);
+  DeducedTemplateSpecializationType::Profile(
+      ID, Template, DeducedType, IsDependent || Template.isDependent());
   if (DeducedTemplateSpecializationType *DTST =
           DeducedTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos))
     return QualType(DTST, 0);
 
   auto *DTST = new (*this, TypeAlignment)
       DeducedTemplateSpecializationType(Template, DeducedType, IsDependent);
+  llvm::FoldingSetNodeID TempID;
+  DTST->Profile(TempID);
+  assert(ID == TempID && "ID does not match");
   Types.push_back(DTST);
   if (InsertPos)
     DeducedTemplateSpecializationTypes.InsertNode(DTST, InsertPos);