diff --git a/rubygem-abstract_method.spec b/rubygem-abstract_method.spec
index 5459afc..eea0a4a 100644
--- a/rubygem-abstract_method.spec
+++ b/rubygem-abstract_method.spec
@@ -20,7 +20,6 @@ Abstract Method is a tiny library enabling you to define abstract methods in
 Ruby classes and modules.
 
 %prep
-%setup -q -n %{gem_name}-%{version} -b 1
 
 %build
 gem build ../%{gem_name}-%{version}.gemspec