diff --git a/clang/lib/AST/ExprClassification.cpp b/clang/lib/AST/ExprClassification.cpp
index e50dd9c..e1d6a1c 100644
--- a/clang/lib/AST/ExprClassification.cpp
+++ b/clang/lib/AST/ExprClassification.cpp
@@ -194,6 +194,9 @@
   case Expr::DesignatedInitUpdateExprClass:
     return Cl::CL_PRValue;
 
+  case Expr::ConstantExprClass:
+    return ClassifyInternal(Ctx, cast<ConstantExpr>(E)->getSubExpr());
+
     // Next come the complicated cases.
   case Expr::SubstNonTypeTemplateParmExprClass:
     return ClassifyInternal(Ctx,