diff --git a/clang/lib/Sema/SemaConcept.cpp b/clang/lib/Sema/SemaConcept.cpp
index 86e63f88378c7..a92bbde113fcd 100644
--- a/clang/lib/Sema/SemaConcept.cpp
+++ b/clang/lib/Sema/SemaConcept.cpp
@@ -1142,8 +1142,7 @@ substituteParameterMappings(Sema &S, NormalizedConstraint &N,
   Sema::InstantiatingTemplate Inst(
       S, ArgsAsWritten->arguments().front().getSourceRange().getBegin(),
       Sema::InstantiatingTemplate::ParameterMappingSubstitution{}, Concept,
-      SourceRange(ArgsAsWritten->arguments()[0].getSourceRange().getBegin(),
-                  ArgsAsWritten->arguments().back().getSourceRange().getEnd()));
+      ArgsAsWritten->arguments().front().getSourceRange());
   if (S.SubstTemplateArguments(*Atomic.ParameterMapping, MLTAL, SubstArgs))
     return true;