diff --git a/rubygem-abstract_method.spec b/rubygem-abstract_method.spec
index 1c03b7e..2c5e706 100644
--- a/rubygem-abstract_method.spec
+++ b/rubygem-abstract_method.spec
@@ -20,7 +20,7 @@ Abstract Method is a tiny library enabling you to define abstract methods in
 Ruby classes and modules.
 # maybe we have to follow other packages' routine
 %prep
-%auto setup -n %{mod_full_name} -p1
+%autosetup -n %{mod_full_name} -p1
 gem unpack %{SOURCE0}
 %build
 gem build ../%{mod_full_name}.gemspec