diff --git a/llvm/Makefile.rules b/llvm/Makefile.rules
index a121fcc657bd..888c5bdf0406 100644
--- a/llvm/Makefile.rules
+++ b/llvm/Makefile.rules
@@ -246,7 +246,7 @@ endif
 
 # IF REQUIRES_RTTI=1 is specified then don't disable run-time type id
 ifndef REQUIRES_RTTI
-  CXX.Flags += -fno-rtti
+#  CXX.Flags += -fno-rtti
 endif
 
 # If DISABLE_ASSERTIONS=1 is specified (make command line or configured),