diff --git a/python-altgraph.spec b/python-altgraph.spec
index 71e6851..3a2be34 100644
--- a/python-altgraph.spec
+++ b/python-altgraph.spec
@@ -30,7 +30,7 @@ graphs, BFS, and DFS traversals, topological sort, shortest paths, etc. with
 graphviz output.
 
 %prep
-%autosetup
+%autosetup -n %{srcname}-%{version}
 
 %build
 %py3_build