diff --git a/src/playsim/actor.h b/src/playsim/actor.h
index 708e06f4c69..759d9d26281 100644
--- a/src/playsim/actor.h
+++ b/src/playsim/actor.h
@@ -445,7 +445,6 @@ enum ActorFlag9
 	MF9_DECOUPLEDANIMATIONS		= 0x00000010,	// [RL0] Decouple model animations from states
 	MF9_NOSECTORDAMAGE			= 0x00000020,	// [inkoalawetrust] Actor ignores any sector-based damage (i.e damaging floors, NOT crushers)
 	MF9_ISPUFF					= 0x00000040,	// [AA] Set on actors by P_SpawnPuff
-	MF9_FORCESECTORDAMAGE		= 0x00000080,	// [inkoalawetrust] Actor ALWAYS takes hurt floor damage if there's any. Even if the floor doesn't have SECMF_HURTMONSTERS.
 };
 
 // --- mobj.renderflags ---
diff --git a/src/playsim/p_mobj.cpp b/src/playsim/p_mobj.cpp
index 4aa95ae83ee..eac012bb451 100644
--- a/src/playsim/p_mobj.cpp
+++ b/src/playsim/p_mobj.cpp
@@ -4436,11 +4436,7 @@ void AActor::Tick ()
 		if (ObjectFlags & OF_EuthanizeMe) return;
 	}
 	//[inkoalawetrust] Genericized level damage handling that makes sector, 3D floor, and TERRAIN flat damage affect monsters and other NPCs too.
-	bool afsdnope = !!(flags9 & MF9_NOSECTORDAMAGE);
-	bool afsdforce = !!(flags9 & MF9_FORCESECTORDAMAGE);
-	bool sfhurtmonsters = !!(Sector->MoreFlags & SECMF_HURTMONSTERS);
-	bool isplayer = (player != nullptr) && (this == player->mo);
-	if ((!afsdnope || afsdforce) && (isplayer || sfhurtmonsters || afsdforce))
+	if (!(flags9 & MF9_NOSECTORDAMAGE) && (player || (player == nullptr && Sector->MoreFlags & SECMF_HURTMONSTERS)))
 	{
 		P_ActorOnSpecial3DFloor(this);
 		P_ActorInSpecialSector(this,Sector);
diff --git a/src/scripting/thingdef_data.cpp b/src/scripting/thingdef_data.cpp
index 90ba65f0085..129c06b7869 100644
--- a/src/scripting/thingdef_data.cpp
+++ b/src/scripting/thingdef_data.cpp
@@ -353,7 +353,6 @@ static FFlagDef ActorFlagDefs[]=
 	DEFINE_FLAG(MF9, DECOUPLEDANIMATIONS, AActor, flags9),
 	DEFINE_FLAG(MF9, NOSECTORDAMAGE, AActor, flags9),
 	DEFINE_PROTECTED_FLAG(MF9, ISPUFF, AActor, flags9), //[AA] was spawned by SpawnPuff
-	DEFINE_FLAG(MF9, FORCESECTORDAMAGE, AActor, flags9),
 
 	// Effect flags
 	DEFINE_FLAG(FX, VISIBILITYPULSE, AActor, effects),