diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -5557,9 +5557,6 @@
   if (S.getLangOpts().OpenMP < 50)
     return;
   SmallVector<OMPClause *, 4> ImplicitMaps;
-  DeclarationNameInfo DefaultMapperId;
-  DefaultMapperId.setName(S.Context.DeclarationNames.getIdentifier(
-      &S.Context.Idents.get("default")));
   for (int Cnt = 0, EndCnt = Clauses.size(); Cnt < EndCnt; ++Cnt) {
     auto *C = dyn_cast<OMPMapClause>(Clauses[Cnt]);
     if (!C)
@@ -5615,6 +5612,10 @@
         if (It == Visited.end()) {
           // Try to find the associated user-defined mapper.
           CXXScopeSpec MapperIdScopeSpec;
+          DeclarationNameInfo DefaultMapperId;
+          DefaultMapperId.setName(S.Context.DeclarationNames.getIdentifier(
+                                  &S.Context.Idents.get("default")));
+          DefaultMapperId.setLoc(E->getExprLoc());
           ExprResult ER = buildUserDefinedMapperRef(
               S, Stack->getCurScope(), MapperIdScopeSpec, DefaultMapperId,
               BaseType, /*UnresolvedMapper=*/nullptr);