diff --git a/source/games/duke/src/actors_d.cpp b/source/games/duke/src/actors_d.cpp
index f4b71a4d5..b797d2ab2 100644
--- a/source/games/duke/src/actors_d.cpp
+++ b/source/games/duke/src/actors_d.cpp
@@ -1009,7 +1009,7 @@ static void movefireext(DDukeActor* actor)
 		auto spawned = CreateActor(actor->sector(), actor->spr.pos.plusZ(krandf(-48)), PClass::FindActor("DukeScrap"), -8, DVector2(0.75, 0.75), a, vel, zvel, actor, STAT_MISC);
 		if (spawned)
 		{
-			if (spawned) spawned->spriteextra = SCRAP3 - gs.firstdebris + krand() & 3;
+			if (spawned) spawned->spriteextra = Scrap3 + krand() & 3;
 			spawned->spr.pal = 2;
 		}
 	}
@@ -2146,7 +2146,7 @@ static void greenslime(DDukeActor *actor)
 					auto spawned = CreateActor(actor->sector(), actor->spr.pos.plusZ(-8), PClass::FindActor("DukeScrap"), -8, DVector2(0.75, 0.75), a, vel, zvel, actor, STAT_MISC);
 					if (spawned)
 					{
-						if (spawned) spawned->spriteextra = SCRAP3 - gs.firstdebris + krand() & 3;
+						if (spawned) spawned->spriteextra = Scrap3 + krand() & 3;
 						spawned->spr.pal = 6;
 					}
 				}
@@ -2262,7 +2262,7 @@ static void greenslime(DDukeActor *actor)
 			auto spawned = CreateActor(actor->sector(), actor->spr.pos.plusZ(-8), PClass::FindActor("DukeScrap"), -8, DVector2(0.75, 0.75), a, vel, zvel, actor, STAT_MISC);
 			if (spawned)
 			{
-				if (spawned) spawned->spriteextra = SCRAP3 - gs.firstdebris + krand() & 3;
+			if (spawned) spawned->spriteextra = Scrap3 + krand() & 3;
 				spawned->spr.pal = 6;
 			}
 		}
diff --git a/source/games/duke/src/constants.h b/source/games/duke/src/constants.h
index 014c4ec74..533fc7279 100644
--- a/source/games/duke/src/constants.h
+++ b/source/games/duke/src/constants.h
@@ -30,6 +30,18 @@ enum
 
 };	
 
+enum EScrap
+{
+	Scrap6 = 0,
+	Scrap1 = 10,
+	Scrap2 = 14,
+	Scrap3 = 18,
+	Scrap4 = 22,
+	Scrap5 = 26,
+	ScrapMax = 30
+};
+
+
 // the available palettes. These are indices into the global table of translations.
 enum basepal_t {
 	BASEPAL = 0,
diff --git a/source/games/duke/src/gameexec.cpp b/source/games/duke/src/gameexec.cpp
index 4ab30e4f8..f36c3c2fd 100644
--- a/source/games/duke/src/gameexec.cpp
+++ b/source/games/duke/src/gameexec.cpp
@@ -2154,6 +2154,7 @@ int ParseState::parse(void)
 	{
 		insptr++;
 		int dnum = *insptr - gs.firstdebris;
+		if (dnum < 0 || dnum >= ScrapMax) break;	// this code only works with scrap and nothing else.
 		insptr++;
 		int count = *insptr;
 		bool weap = fi.spawnweapondebris(g_ac->spr.picnum);
diff --git a/source/games/duke/src/sectors_d.cpp b/source/games/duke/src/sectors_d.cpp
index 8049bdda7..9161bd44f 100644
--- a/source/games/duke/src/sectors_d.cpp
+++ b/source/games/duke/src/sectors_d.cpp
@@ -1077,7 +1077,7 @@ void checkhitsprite_d(DDukeActor* targ, DDukeActor* proj)
 				auto spawned = CreateActor(targ->sector(), targ->spr.pos.plusZ(-48), PClass::FindActor("DukeScrap"), -8, DVector2(0.75, 0.75), a, vel, zvel, targ, STAT_MISC);
 				if (spawned)
 				{
-					if (spawned) spawned->spriteextra = SCRAP3 - gs.firstdebris + krand() & 3;
+					if (spawned) spawned->spriteextra = Scrap3 + krand() & 3;
 					spawned->spr.pal = 6;
 				}
 			}
@@ -1096,7 +1096,7 @@ void checkhitsprite_d(DDukeActor* targ, DDukeActor* proj)
 			auto vel = krandf(4) + 4;
 			auto zvel = -krandf(16) - targ->vel.Z * 0.25;
 			auto spawned = CreateActor(targ->sector(), targ->spr.pos.plusZ(-8), PClass::FindActor("DukeScrap"), -8, DVector2(0.75, 0.75), a, vel, zvel, targ, STAT_MISC);
-			if (spawned) spawned->spriteextra = SCRAP1 - gs.firstdebris + krand() & 15;
+			if (spawned) spawned->spriteextra = Scrap1 + krand() & 15;
 		}
 		S_PlayActorSound(GLASS_HEAVYBREAK, targ);
 		deletesprite(targ);
@@ -1126,7 +1126,7 @@ void checkhitsprite_d(DDukeActor* targ, DDukeActor* proj)
 				auto zvel = -krandf(2) - 1;
 
 				auto spawned = CreateActor(targ->sector(), DVector3(targ->spr.pos.XY(), targ->sector()->floorz - 12 - j * 2), PClass::FindActor("DukeScrap"), -8, DVector2(1, 1), a, vel, zvel, targ, 5);
-				if (spawned) spawned->spriteextra = SCRAP1 - gs.firstdebris + krand() & 15;
+				if (spawned) spawned->spriteextra = Scrap1 + krand() & 15;
 
 			}
 			spawn(targ, EXPLOSION2);
diff --git a/source/games/duke/src/sectors_r.cpp b/source/games/duke/src/sectors_r.cpp
index 76a723489..c11f2c3b6 100644
--- a/source/games/duke/src/sectors_r.cpp
+++ b/source/games/duke/src/sectors_r.cpp
@@ -2151,7 +2151,7 @@ void checkhitsprite_r(DDukeActor* targ, DDukeActor* proj)
 
 				auto spawned = CreateActor(targ->sector(), DVector3(targ->spr.pos.XY(), targ->sector()->floorz - 12 - j * 2), PClass::FindActor("DukeScrap"), -8, DVector2(1, 1),
 					a, vel, zvel, targ, 5);
-				if (spawned) spawned->spriteextra = SCRAP1 - gs.firstdebris + krand() & 15;
+				if (spawned) spawned->spriteextra = Scrap1 + krand() & 15;
 			}
 			spawn(targ, EXPLOSION2);
 			deletesprite(targ);
diff --git a/source/games/duke/src/vmexports.cpp b/source/games/duke/src/vmexports.cpp
index ecf8c6a2f..b85f70a51 100644
--- a/source/games/duke/src/vmexports.cpp
+++ b/source/games/duke/src/vmexports.cpp
@@ -631,7 +631,6 @@ DEFINE_FIELD_X(DukeGameInfo, DukeGameInfo, freezerhurtowner);
 DEFINE_FIELD_X(DukeGameInfo, DukeGameInfo, impact_damage);
 DEFINE_FIELD_X(DukeGameInfo, DukeGameInfo, playerheight);
 DEFINE_FIELD_X(DukeGameInfo, DukeGameInfo, displayflags);
-DEFINE_FIELD_X(DukeGameInfo, DukeGameInfo, firstdebris);
 DEFINE_GLOBAL_UNSIZED(gs)
 
 
diff --git a/wadsrc/static/zscript/games/duke/dukegame.zs b/wadsrc/static/zscript/games/duke/dukegame.zs
index 05e70dd00..eee42a1c2 100644
--- a/wadsrc/static/zscript/games/duke/dukegame.zs
+++ b/wadsrc/static/zscript/games/duke/dukegame.zs
@@ -1268,6 +1268,5 @@ struct DukeGameInfo native
 	readonly native int freezerhurtowner;
 	readonly native int impact_damage;
 	readonly native double playerheight;
-	readonly native int firstdebris;
 	readonly native int displayflags;
 }