diff --git a/src/p_map.cpp b/src/p_map.cpp
index 5b54be076..0bf6e645f 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -942,8 +942,11 @@ bool PIT_CheckThing (AActor *thing, FCheckPosition &tm)
 		|| ((thing->activationtype & THINGSPEC_MissileTrigger) && (tm.thing->flags & MF_MISSILE))
 		) && (level.maptime > thing->lastbump)) // Leave the bumper enough time to go away
 	{
-		if (P_ActivateThingSpecial(thing, tm.thing))
-			thing->lastbump = level.maptime + TICRATE;
+		if (tm.thing->player == NULL || !(tm.thing->player->cheats & CF_PREDICTING))
+		{
+			if (P_ActivateThingSpecial(thing, tm.thing))
+				thing->lastbump = level.maptime + TICRATE;
+		}
 	}
 
 	// Check for skulls slamming into things
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 1acdc2927..7ec1224db 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -3453,8 +3453,11 @@ void AActor::Tick ()
 						|| ((onmo->activationtype & THINGSPEC_MissileTrigger) && (flags & MF_MISSILE))
 						) && (level.maptime > onmo->lastbump)) // Leave the bumper enough time to go away
 					{
-						if (P_ActivateThingSpecial(onmo, this))
-							onmo->lastbump = level.maptime + TICRATE;
+						if (player == NULL || !(player->cheats & CF_PREDICTING))
+						{
+							if (P_ActivateThingSpecial(onmo, this))
+								onmo->lastbump = level.maptime + TICRATE;
+						}
 					}
 					if (velz != 0 && (BounceFlags & BOUNCE_Actors))
 					{