diff --git a/src/facilities/nursery/nursery.tw b/src/facilities/nursery/nursery.tw
index 18a4879a440270ec2178bdb6acb30d519221164a..382e1924d0d1460614ddeba90a008c12225ff1e2 100644
--- a/src/facilities/nursery/nursery.tw
+++ b/src/facilities/nursery/nursery.tw
@@ -8,7 +8,7 @@
 	<<set $nurseryNameCaps = $nurseryName.replace("the ", "The ")>>
 <</if>>
 
-<<set $nurseryBabies = $cribs.length, $freeCribs = $nursery - $nurseryBabies, _SL = $slaves.length, _eligibility = 0, $reservedChildren = FetusGlobalReserveCount("incubator"), $reservedChildrenNursery = FetusGlobalReserveCount("nursery")>>
+<<set $nurseryBabies = $cribs.length, $freeCribs = $nurseryCribs - $nurseryBabies, _SL = $slaves.length, _eligibility = 0, $reservedChildren = FetusGlobalReserveCount("incubator"), $reservedChildrenNursery = FetusGlobalReserveCount("nursery")>>
 
 <<nurseryAssignmentFilter>>
 $nurseryNameCaps