diff --git a/1.4/Assemblies/PerformanceFish.dll b/1.4/Assemblies/PerformanceFish.dll
index 2f9de8f..c4e6b8e 100644
Binary files a/1.4/Assemblies/PerformanceFish.dll and b/1.4/Assemblies/PerformanceFish.dll differ
diff --git a/1.4/Assemblies/PerformanceFish.pdb b/1.4/Assemblies/PerformanceFish.pdb
index 0c87319..4dcef4f 100644
Binary files a/1.4/Assemblies/PerformanceFish.pdb and b/1.4/Assemblies/PerformanceFish.pdb differ
diff --git a/Source/PerformanceFish/JobSystem/DisabledWorkTypesOptimization.cs b/Source/PerformanceFish/JobSystem/DisabledWorkTypesOptimization.cs
index 19ba46a..6fdd3e9 100644
--- a/Source/PerformanceFish/JobSystem/DisabledWorkTypesOptimization.cs
+++ b/Source/PerformanceFish/JobSystem/DisabledWorkTypesOptimization.cs
@@ -17,8 +17,9 @@ public class DisabledWorkTypesOptimization : ClassWithFishPatches
 			= AccessTools.Method(typeof(Pawn), nameof(Pawn.GetDisabledWorkTypes));
 
 		[HarmonyPriority(Priority.VeryLow)]
-		public static bool Prefix(Pawn __instance, bool permanentOnly, out List<WorkTypeDef> __result)
-			=> (__result = permanentOnly
+		public static bool Prefix(Pawn __instance, bool permanentOnly, ref List<WorkTypeDef> __result)
+			=> Current.programStateInt != ProgramState.Playing
+				|| (__result = permanentOnly
 				? __instance.cachedDisabledWorkTypesPermanent
 				: __instance.cachedDisabledWorkTypes) is null;
 	}