diff --git a/source/build/include/build.h b/source/build/include/build.h
index 0859d0592..060bfb49d 100644
--- a/source/build/include/build.h
+++ b/source/build/include/build.h
@@ -509,19 +509,6 @@ inline int32_t getcorrectflorzofslope(int sectnum, int32_t dax, int32_t day)
     return getflorzofslopeptr((usectorptr_t)&sector[sectnum], closest.x, closest.y);
 }
 
-// Is <wal> a red wall in a safe fashion, i.e. only if consistency invariant
-// ".nextsector >= 0 iff .nextwall >= 0" holds.
-inline int32_t redwallp(uwallptr_t wal)
-{
-    return (wal->nextwall >= 0 && wal->nextsector >= 0);
-}
-
-inline int32_t E_SpriteIsValid(const int32_t i)
-{
-    return ((unsigned)i < MAXSPRITES && sprite[i].statnum != MAXSTATUS);
-}
-
-
 void   alignceilslope(int16_t dasect, int32_t x, int32_t y, int32_t z);
 void   alignflorslope(int16_t dasect, int32_t x, int32_t y, int32_t z);
 void setslope(int32_t sectnum, int32_t cf, int16_t slope);
diff --git a/source/games/duke/src/savegame.cpp b/source/games/duke/src/savegame.cpp
index 24470db79..b1c9fe308 100644
--- a/source/games/duke/src/savegame.cpp
+++ b/source/games/duke/src/savegame.cpp
@@ -41,7 +41,7 @@ Prepared for public release: 03/21/2003 - Charlie Wiederhold, 3D Realms
 
 template<> FSerializer& Serialize(FSerializer& arc, const char* key, Duke3d::DDukeActor*& ht, Duke3d::DDukeActor** def)
 {
-	int index = ht? int(ht - Duke3d::hittype) : -1;
+	int index = ht? ht->GetSpriteIndex() : -1;
 	assert(index >= -1 && index < MAXSPRITES);
 	Serialize(arc, key, index, nullptr);
 	ht = index < 0? nullptr : &Duke3d::hittype[index];