diff --git a/matrix-synapse.spec b/matrix-synapse.spec
index cf0ce17..3dec49b 100644
--- a/matrix-synapse.spec
+++ b/matrix-synapse.spec
@@ -89,7 +89,7 @@ the ecosystem.
 
 
 %prep
-%autosetup -p1
+%autosetup -p1 -n %{srcname}-%{version}
 
 # We don't support the built-in client so remove all the bundled JS.
 rm -rf synapse/static