diff --git a/rubygem-rspec-core.spec b/rubygem-rspec-core.spec
index d9bfb25..112b769 100644
--- a/rubygem-rspec-core.spec
+++ b/rubygem-rspec-core.spec
@@ -17,8 +17,6 @@
 # Cucumber integration test suite, which depends on Aruba as well.
 %bcond_with aruba
 
-%undefine __brp_mangle_shebangs
-
 Summary:	RSpec runner and formatters
 Name:		rubygem-%{gem_name}
 Version:	%{majorver}