diff --git a/third-party/unittest/CMakeLists.txt b/third-party/unittest/CMakeLists.txt
--- a/third-party/unittest/CMakeLists.txt
+++ b/third-party/unittest/CMakeLists.txt
@@ -31,7 +31,7 @@
   add_definitions("-Wno-covered-switch-default")
 endif()
 
-set(LLVM_REQUIRES_RTTI 1)
+set(LLVM_REQUIRES_RTTI 0)
 add_definitions( -DGTEST_HAS_RTTI=0 )
 
 if (HAVE_LIBPTHREAD)