diff --git a/.versioneer-lookup b/.versioneer-lookup
index 27a9b5b0..92e8802c 100644
--- a/.versioneer-lookup
+++ b/.versioneer-lookup
@@ -16,7 +16,7 @@ maintenance 1.2.6 96fc70bdb2dd74ba04c3071f70da385b0408904a
 fix/.* 1.2.6 96fc70bdb2dd74ba04c3071f70da385b0408904a
 
 # 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