diff --git a/ReactCommon/cxxreact/BUCK b/ReactCommon/cxxreact/BUCK
index 2639aa51b..5fc980cc3 100644
--- a/ReactCommon/cxxreact/BUCK
+++ b/ReactCommon/cxxreact/BUCK
@@ -2,7 +2,7 @@ CXX_LIBRARY_COMPILER_FLAGS = []
 REACT_LIBRARY_EXTRA_COMPILER_FLAGS = []
 if THIS_IS_FBOBJC:
   inherited_buck_flags = buck_flags(STATIC_LIBRARY_IOS_FLAGS)
-  CXX_LIBRARY_COMPILER_FLAGS = inherited_buck_flags.combined_flags_as_dict()['compiler_flags']
+  CXX_LIBRARY_COMPILER_FLAGS = inherited_buck_flags.get_flag_value('compiler_flags')
   REACT_LIBRARY_EXTRA_COMPILER_FLAGS = ['-Wno-shadow', '-Wno-missing-prototypes', '-Wno-global-constructors']
 
 def kwargs_add(base_kwargs, **new_kwargs):