diff --git a/lib/cocoapods_mangle/defines.rb b/lib/cocoapods_mangle/defines.rb
index 3225799..94e2c11 100644
--- a/lib/cocoapods_mangle/defines.rb
+++ b/lib/cocoapods_mangle/defines.rb
@@ -38,10 +38,13 @@ def self.constants(binaries)
       all_symbols = run_nm(binaries, '-gU')
       consts = all_symbols.select { |const| const[/ S /] }
       consts = consts.reject { |const| const[/_OBJC_/] }
+      consts = consts.reject { |const| const[/__block_descriptor.*/] }
       consts = consts.map! { |const| const.gsub(/^.* _/, '') }
       consts = consts.uniq
 
       other_consts = all_symbols.select { |const| const[/ T /] }
+      other_consts = other_consts.reject { |const| const[/__copy_helper_block.*/] }
+      other_consts = other_consts.reject { |const| const[/__destroy_helper_block.*/] }
       other_consts = other_consts.map! { |const| const.gsub(/^.* _/, '') }
       other_consts = other_consts.uniq