diff --git a/src/d_player.h b/src/d_player.h
index d8fb75eae..e5307fd28 100644
--- a/src/d_player.h
+++ b/src/d_player.h
@@ -130,6 +130,8 @@ public:
 
 	// [GRB] Player class properties
 	fixed_t		JumpZ;
+	fixed_t		GruntSpeed;
+	fixed_t		FallingScreamMinSpeed, FallingScreamMaxSpeed;
 	fixed_t		ViewHeight;
 	fixed_t		ForwardMove1, ForwardMove2;
 	fixed_t		SideMove1, SideMove2;
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index f26f0978a..f0788bb31 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -2476,7 +2476,7 @@ static void PlayerLandedOnThing (AActor *mo, AActor *onmobj)
 	{
 		grunted = false;
 		// Why should this number vary by gravity?
-		if (mo->velz < (fixed_t)(800.f /*level.gravity * mo->Sector->gravity*/ * -983.04f) && mo->health > 0)
+		if (mo->health > 0 && mo->velz < -mo->player->mo->GruntSpeed)
 		{
 			S_Sound (mo, CHAN_VOICE, "*grunt", 1, ATTN_NORM);
 			grunted = true;
diff --git a/src/p_user.cpp b/src/p_user.cpp
index 6b853e8b8..f3cab9236 100644
--- a/src/p_user.cpp
+++ b/src/p_user.cpp
@@ -463,6 +463,16 @@ void APlayerPawn::Serialize (FArchive &arc)
 		<< DamageFade
 		<< PlayerFlags
 		<< FlechetteType;
+	if (SaveVersion < 3829)
+	{
+		GruntSpeed = 12*FRACUNIT;
+		FallingScreamMinSpeed = 35*FRACUNIT;
+		FallingScreamMaxSpeed = 40*FRACUNIT;
+	}
+	else
+	{
+		arc << GruntSpeed << FallingScreamMinSpeed << FallingScreamMaxSpeed;
+	}
 }
 
 //===========================================================================
@@ -2383,8 +2393,8 @@ void P_PlayerThink (player_t *player)
 			P_PlayerInSpecialSector (player);
 		}
 		P_PlayerOnSpecialFlat (player, P_GetThingFloorType (player->mo));
-		if (player->mo->velz <= -35*FRACUNIT &&
-			player->mo->velz >= -40*FRACUNIT && !player->morphTics &&
+		if (player->mo->velz <= -player->mo->FallingScreamMinSpeed &&
+			player->mo->velz >= -player->mo->FallingScreamMaxSpeed && !player->morphTics &&
 			player->mo->waterlevel == 0)
 		{
 			int id = S_FindSkinnedSound (player->mo, "*falling");
diff --git a/src/thingdef/thingdef_properties.cpp b/src/thingdef/thingdef_properties.cpp
index eb11972f1..f5dc0d91f 100644
--- a/src/thingdef/thingdef_properties.cpp
+++ b/src/thingdef/thingdef_properties.cpp
@@ -2237,6 +2237,26 @@ DEFINE_CLASS_PROPERTY_PREFIX(player, jumpz, F, PlayerPawn)
 	defaults->JumpZ = z;
 }
 
+//==========================================================================
+//
+//==========================================================================
+DEFINE_CLASS_PROPERTY_PREFIX(player, GruntSpeed, F, PlayerPawn)
+{
+	PROP_FIXED_PARM(z, 0);
+	defaults->GruntSpeed = z;
+}
+
+//==========================================================================
+//
+//==========================================================================
+DEFINE_CLASS_PROPERTY_PREFIX(player, FallingScreamSpeed, FF, PlayerPawn)
+{
+	PROP_FIXED_PARM(minz, 0);
+	PROP_FIXED_PARM(maxz, 0);
+	defaults->FallingScreamMinSpeed = minz;
+	defaults->FallingScreamMaxSpeed = maxz;
+}
+
 //==========================================================================
 //
 //==========================================================================
diff --git a/wadsrc/static/actors/shared/player.txt b/wadsrc/static/actors/shared/player.txt
index 3edb7aa40..05fb998c3 100644
--- a/wadsrc/static/actors/shared/player.txt
+++ b/wadsrc/static/actors/shared/player.txt
@@ -21,6 +21,8 @@ Actor PlayerPawn : Actor native
 	+NOBLOCKMONST
 	Player.AttackZOffset 8
 	Player.JumpZ 8
+	Player.GruntSpeed 12
+	Player.FallingScreamSpeed 35,40
 	Player.ViewHeight 41
 	Player.ForwardMove 1,1
 	Player.SideMove 1,1