diff --git a/sip.spec b/sip.spec
index 259de57..2630699 100644
--- a/sip.spec
+++ b/sip.spec
@@ -43,7 +43,7 @@ classes library.
 
 %prep
 
-%setup -q -n %{name}-%{version}-snapshot-%{snap}
+%setup -q -n %{name}-%{version}%{?snap:-snapshot-%{snap}}
 
 
 %build