diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index 77d5f674c..cb5b1cb09 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,4 +1,5 @@
 October 28, 2009
+- Fixed: 0 damage projectiles did not call P_DamageMobj.
 - Fixed: Do not exit P_DamageMobj early if damage is 0, so we can still get
   the side effects from it. PainThreshold also needs to be inclusive, as
   the docs already state.
diff --git a/src/p_map.cpp b/src/p_map.cpp
index de3653a0e..35e512c04 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -1092,7 +1092,7 @@ bool PIT_CheckThing (AActor *thing, FCheckPosition &tm)
 		// Do damage
 		damage = tm.thing->GetMissileDamage ((tm.thing->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1);
 		// [GZ] If MF6_FORCEPAIN is set, we need to call P_DamageMobj even if damage is 0!
-		if ((damage > 0) || (tm.thing->flags6 & MF6_FORCEPAIN)) 
+		if ((damage >= 0) || (tm.thing->flags6 & MF6_FORCEPAIN)) 
 		{
 			P_DamageMobj (thing, tm.thing, tm.thing->target, damage, tm.thing->DamageType);
 			if (damage > 0)