diff --git a/source/games/sw/src/sprite.cpp b/source/games/sw/src/sprite.cpp
index 801ef3365..bc9f13a18 100644
--- a/source/games/sw/src/sprite.cpp
+++ b/source/games/sw/src/sprite.cpp
@@ -6947,10 +6947,9 @@ void ActorWarpType(DSWActor* sp, DSWActor* act_warp)
 // This moves a small projectile with FAFgetzrangepoint
 //
 
-int
-MissileWaterAdjust(short SpriteNum)
+int MissileWaterAdjust(DSWActor* actor)
 {
-    USERp u = User[SpriteNum].Data();
+    USERp u = actor->u();
 
     if (u->lo_sectp)
     {
@@ -7046,7 +7045,7 @@ move_missile(int spritenum, int xchange, int ychange, int zchange, int ceildist,
 
     // getzrangepoint moves water down
     // missiles don't need the water to be down
-    MissileWaterAdjust(spritenum);
+    MissileWaterAdjust(actor);
 
     clippos.z = sp->z + ((zchange * numtics) >> 3);
 
@@ -7265,13 +7264,6 @@ move_ground_missile(short spritenum, int xchange, int ychange, int ceildist, int
         return retval;
     }
 
-    // getzrangepoint moves water down
-    // missiles don't need the water to be down
-    //MissileWaterAdjust(spritenum);
-
-    //if (FAF_ConnectArea(sp->sectnum))
-    //    setspritez(spritenum, &sp->pos);
-
     if (TEST(sector[sp->sectnum].extra, SECTFX_WARP_SECTOR))
     {
         DSWActor* sp_warp;
diff --git a/source/games/sw/src/sprite.h b/source/games/sw/src/sprite.h
index 2cddd87b2..fcec7f0a4 100644
--- a/source/games/sw/src/sprite.h
+++ b/source/games/sw/src/sprite.h
@@ -56,7 +56,7 @@ int ActorCoughItem(DSWActor*);
 bool ActorSpawn(DSWActor*);
 int SpawnItemsMatch(short match);
 void PicAnimOff(short picnum);
-int MissileWaterAdjust(short SpriteNum);
+int MissileWaterAdjust(DSWActor*);
 bool SpriteOverlapZ(int16_t spritenum_a,int16_t spritenum_b,int z_overlap);
 
 enum
diff --git a/source/games/sw/src/weapon.cpp b/source/games/sw/src/weapon.cpp
index 46f0212af..bf428e151 100644
--- a/source/games/sw/src/weapon.cpp
+++ b/source/games/sw/src/weapon.cpp
@@ -3897,7 +3897,7 @@ DoVomit(DSWActor* actor)
     {
         ChangeState(actor, s_VomitSplash);
         DoFindGroundPoint(actor);
-        MissileWaterAdjust(SpriteNum);
+        MissileWaterAdjust(actor);
         sp->z = u->loz;
         u->WaitTics = 60;
         u->sx = sp->xrepeat;
@@ -7904,7 +7904,7 @@ DoStar(DSWActor* actor)
         sp->z += 128 * MISSILEMOVETICS;
 
         DoActorZrange(actor);
-        MissileWaterAdjust(Weapon);
+        MissileWaterAdjust(actor);
 
         if (sp->z > u->loz)
         {
@@ -12057,7 +12057,7 @@ DoNapalm(DSWActor* actor)
         eu->Radius = 1500;
 
         DoFindGroundPoint(expActor);
-        MissileWaterAdjust(explosion);
+        MissileWaterAdjust(expActor);
         exp->z = eu->loz;
         exp->backupz();
 
@@ -19315,7 +19315,7 @@ bool SpriteWarpToSurface(DSWActor* actor)
 
     // set z range and wade depth so we know how high to set view
     DoActorZrange(actor);
-    MissileWaterAdjust(short(sp - sprite));
+    MissileWaterAdjust(actor);
 
 
     sp->backuppos();
@@ -19344,7 +19344,7 @@ int SpawnSplash(DSWActor* actor)
     PlaySound(DIGI_SPLASH1, actor, v3df_none);
 
     DoActorZrange(actor);
-    MissileWaterAdjust(actor->GetSpriteIndex());
+    MissileWaterAdjust(actor);
 
     auto actorNew = SpawnActor(STAT_MISSILE, SPLASH, s_Splash, sp->sectnum, sp->x, sp->y, u->loz, sp->ang, 0);
     wp = &actorNew->s();
diff --git a/source/games/sw/src/weapon.h b/source/games/sw/src/weapon.h
index 8bc3a72c7..27293bdc7 100644
--- a/source/games/sw/src/weapon.h
+++ b/source/games/sw/src/weapon.h
@@ -79,7 +79,6 @@ void ScaleSpriteVector(DSWActor* actor, int scale);
 void QueueHole(short hit_sect, short hit_wall, int hit_x, int hit_y, int hit_z);
 DSWActor* QueueWallBlood(DSWActor* hit, short ang);
 bool SlopeBounce(DSWActor*, bool *hit_wall);
-bool HitscanSpriteAdjust(short SpriteNum, short hit_wall);
 int SpawnSwordSparks(PLAYERp pp, short hit_sect, short hit_wall, int hit_x, int hit_y, int hit_z, short hit_ang);
 DSWActor* SpawnBubble(DSWActor*);
 int SpawnFireballExp(DSWActor*);