diff --git a/.versioneer-lookup b/.versioneer-lookup
index 203936b4..11b214ac 100644
--- a/.versioneer-lookup
+++ b/.versioneer-lookup
@@ -19,7 +19,7 @@ fix/.* 1.2.8 6c622f7c4332b71c6ece59552ffc87c146155c84 pep440-dev
 \(detached.*
 
 # Special case disconnected checkouts, e.g. 'git checkout <tag>'
-(detached.*
+\(detached.*
 
 # every other branch is a development branch and thus gets resolved to 1.3.0-dev for now
 .* 1.3.0 198d3450d94be1a2 pep440-dev