diff --git a/src/info.c b/src/info.c
index 8646a2ef1..074e31ba2 100644
--- a/src/info.c
+++ b/src/info.c
@@ -19480,7 +19480,7 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 		100,            // mass
 		0,              // damage
 		sfx_None,       // activesound
-		MF_NOBLOCKMAP|MF_NOCLIPTHING|MF_RUNSPAWNFUNC|MF_NOCLIPHEIGHT, // flags
+		MF_NOBLOCKMAP|MF_NOCLIPTHING|MF_RUNSPAWNFUNC|MF_NOCLIPHEIGHT|MF_SCENERY, // flags
 		S_NULL          // raisestate
 	},
 
diff --git a/src/p_mobj.c b/src/p_mobj.c
index 8bacd212f..971c03e6b 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -7332,6 +7332,7 @@ void P_MobjThinker(mobj_t *mobj)
 			case MT_ROCKCRUMBLE14:
 			case MT_ROCKCRUMBLE15:
 			case MT_ROCKCRUMBLE16:
+			case MT_WOODDEBRIS:
 				if (mobj->z <= P_FloorzAtPos(mobj->x, mobj->y, mobj->z, mobj->height)
 					&& mobj->state != &states[mobj->info->deathstate])
 				{