diff --git a/src/d_clisrv.c b/src/d_clisrv.c
index dc6b93bc8..f1cacc833 100644
--- a/src/d_clisrv.c
+++ b/src/d_clisrv.c
@@ -5618,7 +5618,7 @@ static INT16 Consistancy(void)
 			if (TypeIsNetSynced(mo->type) == false)
 				continue;
 
-			if (mo->flags & (MF_SPECIAL | MF_SOLID | MF_PUSHABLE | MF_BOSS | MF_MISSILE | MF_SPRING | MF_FIRE | MF_ENEMY | MF_PAIN | MF_DONTPUNT))
+			if (mo->flags & (MF_SPECIAL | MF_SOLID | MF_PUSHABLE | MF_BOSS | MF_MISSILE | MF_SPRING | MF_ELEMENTAL | MF_FIRE | MF_ENEMY | MF_PAIN | MF_DONTPUNT))
 			{
 				ret -= mo->type;
 				ret += mo->x;
diff --git a/src/deh_tables.c b/src/deh_tables.c
index d521a63de..daaa3ec59 100644
--- a/src/deh_tables.c
+++ b/src/deh_tables.c
@@ -5987,7 +5987,7 @@ const char *const MOBJFLAG_LIST[] = {
 	"SLOPE",
 	"MISSILE",
 	"SPRING",
-	"\x01", // free: 1<<17 (name un-matchable)
+	"ELEMENTAL",
 	"NOTHINK",
 	"NOCLIPHEIGHT",
 	"ENEMY",
diff --git a/src/p_mobj.h b/src/p_mobj.h
index d469552cb..61780c004 100644
--- a/src/p_mobj.h
+++ b/src/p_mobj.h
@@ -137,7 +137,8 @@ typedef enum
 	MF_MISSILE          = 1<<15,
 	// Item is a spring.
 	MF_SPRING           = 1<<16,
-	// free: 1<<17
+	// Object is elemental. If it is punted, it will evaporate.
+	MF_ELEMENTAL        = 1<<17,
 	// Don't run the thinker for this object.
 	MF_NOTHINK          = 1<<18,
 	// Don't adjust z if below or above floorz/ceilingz
diff --git a/src/r_bbox.c b/src/r_bbox.c
index b828e989d..ce4f3d758 100644
--- a/src/r_bbox.c
+++ b/src/r_bbox.c
@@ -240,7 +240,7 @@ static boolean is_tangible (mobj_t *thing)
 	// These objects probably do nothing! :D
 	if ((thing->flags & (MF_SPECIAL|MF_SOLID|MF_SHOOTABLE
 					|MF_PUSHABLE|MF_BOSS|MF_MISSILE|MF_SPRING
-					|MF_ENEMY|MF_PAIN|MF_DONTPUNT
+					|MF_ELEMENTAL|MF_ENEMY|MF_PAIN|MF_DONTPUNT
 					|MF_PICKUPFROMBELOW)) == 0U)
 	{
 		return false;