diff --git a/source/games/sw/src/game.h b/source/games/sw/src/game.h
index b90c70d8c..e596d35a8 100644
--- a/source/games/sw/src/game.h
+++ b/source/games/sw/src/game.h
@@ -616,8 +616,7 @@ struct PLAYER
     double pbob_amt;
 
     int jump_count, jump_speed;     // jumping
-    int16_t down_speed, up_speed; // diving
-    double z_speed; // used for diving and flying instead of down_speed, up_speed
+    double z_speed;
     int climb_ndx;
     double p_ceiling_dist,p_floor_dist;
     sectortype* hi_sectp, *lo_sectp;
diff --git a/source/games/sw/src/player.cpp b/source/games/sw/src/player.cpp
index 8c0f48d3e..0b87d733e 100644
--- a/source/games/sw/src/player.cpp
+++ b/source/games/sw/src/player.cpp
@@ -4401,7 +4401,7 @@ void DoPlayerDive(PLAYER* pp)
     }
 
     // make player bob if sitting still
-    if (!PLAYER_MOVING(pp) && pp->z_speed == 0 && pp->up_speed == 0)
+    if (!PLAYER_MOVING(pp) && pp->z_speed == 0)
     {
         DoPlayerSpriteBob(pp, PLAYER_DIVE_HEIGHTF, PLAYER_DIVE_BOB_AMT, 3);
     }
@@ -6989,8 +6989,6 @@ saveable_module saveable_player =
 DEFINE_FIELD_X(SWPlayer, PLAYER, sop_remote)
 DEFINE_FIELD_X(SWPlayer, PLAYER, jump_count)
 DEFINE_FIELD_X(SWPlayer, PLAYER, jump_speed)
-DEFINE_FIELD_X(SWPlayer, PLAYER, down_speed)
-DEFINE_FIELD_X(SWPlayer, PLAYER, up_speed)
 DEFINE_FIELD_X(SWPlayer, PLAYER, z_speed)
 DEFINE_FIELD_X(SWPlayer, PLAYER, climb_ndx)
 DEFINE_FIELD_X(SWPlayer, PLAYER, hiz)
diff --git a/source/games/sw/src/save.cpp b/source/games/sw/src/save.cpp
index 2644d83f7..78bda0465 100644
--- a/source/games/sw/src/save.cpp
+++ b/source/games/sw/src/save.cpp
@@ -449,8 +449,6 @@ FSerializer& Serialize(FSerializer& arc, const char* keyname, PLAYER& w, PLAYER*
 			("sop", w.sop)
 			("jump_count", w.jump_count)
 			("jump_speed", w.jump_speed)
-			("down_speed", w.down_speed)
-			("up_speed", w.up_speed)
 			("z_speed", w.z_speed)
 			("climb_ndx", w.climb_ndx)
 			("hiz", w.hiz)
diff --git a/wadsrc/static/zscript/games/sw/swgame.zs b/wadsrc/static/zscript/games/sw/swgame.zs
index ba6062a55..24db162e7 100644
--- a/wadsrc/static/zscript/games/sw/swgame.zs
+++ b/wadsrc/static/zscript/games/sw/swgame.zs
@@ -188,8 +188,7 @@ struct SWPlayer native
     native voidptr sop_remote;	// the status bar needs to check this - remove once the underlying type can be supported.
 
     native int jump_count, jump_speed;     // jumping
-    native int16 down_speed, up_speed; // diving
-    native double z_speed; // used for diving and flying instead of down_speed, up_speed
+    native double z_speed;
     native int climb_ndx;
     native double hiz,loz;
     native double p_ceiling_dist,p_floor_dist;