diff --git a/Source/d_deh.c b/Source/d_deh.c
index ac5cc89b..3f2487ce 100644
--- a/Source/d_deh.c
+++ b/Source/d_deh.c
@@ -1123,6 +1123,7 @@ static const struct deh_flag_s deh_mobjflags_mbf21[] = {
   {"E4M6BOSS",       MF2_E4M6BOSS}, // E4M6 boss
   {"E4M8BOSS",       MF2_E4M8BOSS}, // E4M8 boss
   {"RIP",            MF2_RIP}, // projectile rips through targets
+  {"FULLVOLSOUNDS",  MF2_FULLVOLSOUNDS}, // full volume see / death sound
   { NULL }
 };
 
diff --git a/Source/d_main.c b/Source/d_main.c
index 4d4f72ee..54597b31 100644
--- a/Source/d_main.c
+++ b/Source/d_main.c
@@ -1704,8 +1704,8 @@ void D_DoomMain(void)
 
     mobjinfo[MT_VILE].flags2    = MF2_SHORTMRANGE | MF2_DMGIGNORED | MF2_NOTHRESHOLD;
     mobjinfo[MT_CYBORG].flags2  = MF2_NORADIUSDMG | MF2_HIGHERMPROB | MF2_RANGEHALF |
-                                  MF2_BOSS | MF2_E2M8BOSS | MF2_E4M6BOSS;
-    mobjinfo[MT_SPIDER].flags2  = MF2_NORADIUSDMG | MF2_RANGEHALF | MF2_BOSS |
+                                  MF2_FULLVOLSOUNDS | MF2_E2M8BOSS | MF2_E4M6BOSS;
+    mobjinfo[MT_SPIDER].flags2  = MF2_NORADIUSDMG | MF2_RANGEHALF | MF2_FULLVOLSOUNDS |
                                   MF2_E3M8BOSS | MF2_E4M8BOSS;
     mobjinfo[MT_SKULL].flags2   = MF2_RANGEHALF;
     mobjinfo[MT_FATSO].flags2   = MF2_MAP07BOSS1;
diff --git a/Source/p_enemy.c b/Source/p_enemy.c
index 52487400..5bdb152f 100644
--- a/Source/p_enemy.c
+++ b/Source/p_enemy.c
@@ -1055,7 +1055,7 @@ void A_Look(mobj_t *actor)
           sound = actor->info->seesound;
           break;
         }
-      if (actor->flags2 & MF2_BOSS)
+      if (actor->flags2 & (MF2_BOSS | MF2_FULLVOLSOUNDS))
         S_StartSound(NULL, sound);          // full volume
       else
       {
@@ -2070,7 +2070,7 @@ void A_Scream(mobj_t *actor)
     }
 
   // Check for bosses.
-  if (actor->flags2 & MF2_BOSS)
+  if (actor->flags2 & (MF2_BOSS | MF2_FULLVOLSOUNDS))
     S_StartSound(NULL, sound); // full volume
   else
     S_StartSound(actor, sound);
diff --git a/Source/p_mobj.h b/Source/p_mobj.h
index e94cf48b..936053d1 100644
--- a/Source/p_mobj.h
+++ b/Source/p_mobj.h
@@ -227,6 +227,7 @@ typedef enum
     MF2_E4M8BOSS        = 0x00010000, // is an E4M8 boss
     MF2_RIP             = 0x00020000, // missile rips through solid
     MF2_COLOREDBLOOD    = 0x00040000, // [FG] colored blood and gibs
+    MF2_FULLVOLSOUNDS   = 0x00080000, // full volume see / death sound
 } mobjflag2_t;
 
 // killough 9/15/98: Same, but internal flags, not intended for .deh