diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index 8a4ada3072..5ed9c4447e 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,3 +1,7 @@
+December 24, 2006 (Changes by Graf Zahl)
+- Added new flag MF5_NOBLOODDECALS that prevents bleeding actors from spawning
+  blood decals.
+
 December 23, 2006 (Changes by Graf Zahl)
 - Fixed: The Cacodemon doesn't have a melee attack defined as I mistakenly
   assumed when writing its DECORATE code.
diff --git a/src/actor.h b/src/actor.h
index cf04852038..057a53adcf 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -288,6 +288,7 @@ enum
 	MF5_OLDRADIUSDMG	= 0x00000200,	// Use old radius damage code (for barrels and boss brain)
 	MF5_DEHEXPLOSION	= 0x00000400,	// Use the DEHACKED explosion options when this projectile explodes
 	MF5_PIERCEARMOR		= 0x00000800,	// Armor doesn't protect against damage from this actor
+	MF5_NOBLOODDECALS	= 0x00001000,	// Actor bleeds but doesn't spawn blood decals
 
 // --- mobj.renderflags ---
 
diff --git a/src/p_map.cpp b/src/p_map.cpp
index f0e0d05fa2..7cbdf4973f 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -2932,6 +2932,7 @@ void P_TraceBleed (int damage, fixed_t x, fixed_t y, fixed_t z, AActor *actor, a
 	int noise;
 
 	if ((actor->flags & MF_NOBLOOD) ||
+		(actor->flags5 & MF5_NOBLOODDECALS) ||
 		(actor->flags2 & (MF2_INVULNERABLE|MF2_DORMANT)) ||
 		(actor->player && actor->player->cheats & CF_GODMODE))
 	{
diff --git a/src/thingdef.cpp b/src/thingdef.cpp
index 7759c7be88..da1cd764b9 100644
--- a/src/thingdef.cpp
+++ b/src/thingdef.cpp
@@ -226,6 +226,7 @@ static flagdef ActorFlags[]=
 	DEFINE_FLAG(MF5, OLDRADIUSDMG, AActor, flags5),
 	DEFINE_FLAG(MF5, DEHEXPLOSION, AActor, flags5),
 	DEFINE_FLAG(MF5, PIERCEARMOR, AActor, flags5),
+	DEFINE_FLAG(MF5, NOBLOODDECALS, AActor, flags5),
 
 	// Effect flags
 	DEFINE_FLAG(FX, VISIBILITYPULSE, AActor, effects),