diff --git a/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs b/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
index debbb75..38a25de 100644
--- a/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
+++ b/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
@@ -301,10 +301,10 @@ namespace RJW_Menstruation
     // So make it always consider the mother to have one baby
     public static class HAR_LitterSize_Undo
     {
-        public static void Postfix(ref int __result, Pawn mother)
+        public static void Postfix(ref int __result)
         {
-            if (Configurations.PregnancySource != Configurations.PregnancyType.Biotech || !Configurations.EnableBiotechTwins) return;
-            __result = 0;
+            if (Configurations.PregnancySource == Configurations.PregnancyType.Biotech && Configurations.EnableBiotechTwins)
+                __result = 0;
             return;
         }
     }