diff --git a/clang/lib/Sema/SemaCast.cpp b/clang/lib/Sema/SemaCast.cpp
index f4d8e8d..32cb307 100644
--- a/clang/lib/Sema/SemaCast.cpp
+++ b/clang/lib/Sema/SemaCast.cpp
@@ -267,6 +267,12 @@
                                                 AngleBrackets));
 
   case tok::kw_dynamic_cast: {
+    // OpenCL C++ 1.0 s2.9: dynamic_cast is not supported.
+    if (getLangOpts().OpenCLCPlusPlus) {
+      return ExprError(Diag(OpLoc, diag::err_openclcxx_not_supported)
+                       << "dynamic_cast");
+    }
+
     if (!TypeDependent) {
       Op.CheckDynamicCast();
       if (Op.SrcExpr.isInvalid())