diff --git a/src/g_shared/actorptrselect.cpp b/src/g_shared/actorptrselect.cpp
index 5cf3264805..6bd35dd6c8 100644
--- a/src/g_shared/actorptrselect.cpp
+++ b/src/g_shared/actorptrselect.cpp
@@ -62,13 +62,12 @@
 	Only one selector of each type can be used.
 */
 
-AActor *COPY_AAPTR(AActor *origin, int selector)
+AActor *COPY_AAPTREX(FLevelLocals *Level, AActor *origin, int selector)
 {
 	if (selector == AAPTR_DEFAULT) return origin;
 
 	FTranslatedLineTarget t;
 
-	auto Level = origin->Level;
 	auto AAPTR_RESOLVE_PLAYERNUM = [=](int playernum) -> AActor*
 	{
 		return (Level->PlayerInGame(playernum) ? Level->Players[playernum]->mo : nullptr);
@@ -119,6 +118,11 @@ AActor *COPY_AAPTR(AActor *origin, int selector)
 	return origin;
 }
 
+AActor *COPY_AAPTR(AActor *origin, int selector)
+{
+	if (origin == nullptr) return nullptr;
+	return COPY_AAPTREX(origin->Level, origin, selector);
+}
 
 // [FDARI] Exported logic for guarding against loops in Target (for missiles) and Master (for all) chains.
 // It is called from multiple locations.
diff --git a/src/g_shared/actorptrselect.h b/src/g_shared/actorptrselect.h
index 6fdc0ab33e..52582e03f7 100644
--- a/src/g_shared/actorptrselect.h
+++ b/src/g_shared/actorptrselect.h
@@ -64,8 +64,9 @@ enum AAPTR
 	Only one selector of each type can be used.
 */
 
+struct FLevelLocals;
 AActor *COPY_AAPTR(AActor *origin, int selector);
-
+AActor *COPY_AAPTREX(FLevelLocals *Level, AActor *origin, int selector);
 enum PTROP
 {
 	PTROP_UNSAFETARGET = 1,
diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index f33c35ed95..14be286dec 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -5352,7 +5352,7 @@ int DLevelScript::CallFunction(int argCount, int funcIndex, int32_t *args)
 				AActor *ptr = Level->SingleActorFromTID(args[1], activator);
 				if (argCount > 2)
 				{
-					ptr = COPY_AAPTR(ptr, args[2]);
+					ptr = COPY_AAPTREX(Level, ptr, args[2]);
 				}
 				if (ptr == activator) ptr = NULL;
 				ASSIGN_AAPTR(activator, args[0], ptr, (argCount > 3) ? args[3] : 0);
@@ -6326,7 +6326,7 @@ doplaysound:			if (funcIndex == ACSF_PlayActorSound)
 				actor = Level->SingleActorFromTID(tid1, activator);
 				AActor * actor2 = tid2 == tid1 ? actor : Level->SingleActorFromTID(tid2, activator);
 
-				return COPY_AAPTR(actor, args[0]) == COPY_AAPTR(actor2, args[1]);
+				return COPY_AAPTREX(Level, actor, args[0]) == COPY_AAPTREX(Level, actor2, args[1]);
 			}
 			break;
 
@@ -6504,7 +6504,7 @@ doplaysound:			if (funcIndex == ACSF_PlayActorSound)
 			int count = argCount >= 4 ? args[3] : 1;
 			int flags = argCount >= 5 ? args[4] : 0;
 			int ptr = argCount >= 6 ? args[5] : AAPTR_DEFAULT;
-			return P_Thing_CheckProximity(actor, classname, distance, count, flags, ptr);
+			return P_Thing_CheckProximity(Level, actor, classname, distance, count, flags, ptr);
 		}
 
 		case ACSF_CheckActorState:
@@ -6528,8 +6528,8 @@ doplaysound:			if (funcIndex == ACSF_PlayActorSound)
 		case ACSF_DamageActor: // [arookas] wrapper around P_DamageMobj
 		{
 			// (target, ptr_select1, inflictor, ptr_select2, amount, damagetype)
-			AActor* target = COPY_AAPTR(Level->SingleActorFromTID(args[0], activator), args[1]);
-			AActor* inflictor = COPY_AAPTR(Level->SingleActorFromTID(args[2], activator), args[3]);
+			AActor* target = COPY_AAPTREX(Level, Level->SingleActorFromTID(args[0], activator), args[1]);
+			AActor* inflictor = COPY_AAPTREX(Level, Level->SingleActorFromTID(args[2], activator), args[3]);
 			FName damagetype(Level->Behaviors.LookupString(args[5]));
 			return P_DamageMobj(target, inflictor, inflictor, args[4], damagetype);
 		}
diff --git a/src/p_actionfunctions.cpp b/src/p_actionfunctions.cpp
index fbb97c7d07..f37f8d9cc5 100644
--- a/src/p_actionfunctions.cpp
+++ b/src/p_actionfunctions.cpp
@@ -485,7 +485,7 @@ DEFINE_ACTION_FUNCTION(AActor, CountProximity)
 		}
 		else
 		{
-			ret->SetInt(P_Thing_CheckProximity(self, classname, distance, 0, flags, ptr, true));
+			ret->SetInt(P_Thing_CheckProximity(self->Level, self, classname, distance, 0, flags, ptr, true));
 		}
 		return 1;
 	}
@@ -4520,7 +4520,7 @@ DEFINE_ACTION_FUNCTION(AActor, CheckProximity)
 	PARAM_INT(flags);
 	PARAM_INT(ptr);
 
-	ACTION_RETURN_BOOL(!!P_Thing_CheckProximity(self, classname, distance, count, flags, ptr));
+	ACTION_RETURN_BOOL(!!P_Thing_CheckProximity(self->Level, self, classname, distance, count, flags, ptr));
 }
 
 /*===========================================================================
diff --git a/src/p_local.h b/src/p_local.h
index 93405dc08a..c968eb2b88 100644
--- a/src/p_local.h
+++ b/src/p_local.h
@@ -148,7 +148,8 @@ PClassActor *P_GetSpawnableType(int spawnnum);
 void InitSpawnablesFromMapinfo();
 int P_Thing_CheckInputNum(player_t *p, int inputnum);
 int P_Thing_Warp(AActor *caller, AActor *reference, double xofs, double yofs, double zofs, DAngle angle, int flags, double heightoffset, double radiusoffset, DAngle pitch);
-int P_Thing_CheckProximity(AActor *self, PClass *classname, double distance, int count, int flags, int ptr, bool counting = false);
+struct FLevelLocals;
+int P_Thing_CheckProximity(FLevelLocals *Level, AActor *self, PClass *classname, double distance, int count, int flags, int ptr, bool counting = false);
 
 enum
 {
diff --git a/src/p_things.cpp b/src/p_things.cpp
index e631389764..da8efa4807 100644
--- a/src/p_things.cpp
+++ b/src/p_things.cpp
@@ -567,9 +567,9 @@ int P_Thing_CheckInputNum(player_t *p, int inputnum)
 	}
 	return renum;
 }
-int P_Thing_CheckProximity(AActor *self, PClass *classname, double distance, int count, int flags, int ptr, bool counting)
+int P_Thing_CheckProximity(FLevelLocals *Level, AActor *self, PClass *classname, double distance, int count, int flags, int ptr, bool counting)
 {
-	AActor *ref = COPY_AAPTR(self, ptr);
+	AActor *ref = COPY_AAPTREX(Level, self, ptr);
 
 	// We need these to check out.
 	if (!ref || !classname || distance <= 0)