diff --git a/.versioneer-lookup b/.versioneer-lookup
index 35264944..7ebfbb76 100644
--- a/.versioneer-lookup
+++ b/.versioneer-lookup
@@ -15,5 +15,8 @@ master
 maintenance 1.2.5 9a6099ffc2982455d631c9d68a3273d9eb55885c
 fix/.* 1.2.5 9a6099ffc2982455d631c9d68a3273d9eb55885c
 
+# Special case disconnected checkouts, e.g. 'git checkout <tag>'
+(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