diff --git a/src/g_statusbar/shared_sbar.cpp b/src/g_statusbar/shared_sbar.cpp
index 6be4abf9f..4fc4720a0 100644
--- a/src/g_statusbar/shared_sbar.cpp
+++ b/src/g_statusbar/shared_sbar.cpp
@@ -588,6 +588,13 @@ DEFINE_ACTION_FUNCTION(DBaseStatusBar, BeginHUD)
 	return 0;
 }
 
+DEFINE_ACTION_FUNCTION(DBaseStatusBar, UpdateScreenGeometry)
+{
+	PARAM_SELF_PROLOGUE(DBaseStatusBar);
+	setsizeneeded = true;
+	return 0;
+}
+
 //---------------------------------------------------------------------------
 //
 // PROC AttachToPlayer
diff --git a/wadsrc/static/zscript/level_compatibility.txt b/wadsrc/static/zscript/level_compatibility.txt
index e007e98dd..e7bd242be 100644
--- a/wadsrc/static/zscript/level_compatibility.txt
+++ b/wadsrc/static/zscript/level_compatibility.txt
@@ -5,6 +5,22 @@ class LevelCompatibility play
 	{
 		switch (checksum)
 		{			
+			case '9527DD0809FDA39CCFC316A21D135783': // HACX.WAD map05
+			{
+				// fix non-functional self-referencing sector hack.
+				for(int i = 578; i < 582; i++) 
+					SetLineSectorRef(i, Line.back, 91);
+				
+				for(int i = 707; i < 714; i++)
+					SetLineSectorRef(i, Line.back, 91);
+
+				SetLineSectorRef(736, Line.front, 91);
+				SetLineSectorRef(659, Line.front, 91);
+				SetLineSpecial(659, Transfer_Heights, 60);
+				break;
+			}
+			
+		
 			case 'E2B5D1400279335811C1C1C0B437D9C8': // Deathknights of the Dark Citadel, map54
 			{
 				// This map has two gear boxes which are flagged for player cross
diff --git a/wadsrc/static/zscript/statusbar/statusbar.txt b/wadsrc/static/zscript/statusbar/statusbar.txt
index 6b74e3d01..385db36bf 100644
--- a/wadsrc/static/zscript/statusbar/statusbar.txt
+++ b/wadsrc/static/zscript/statusbar/statusbar.txt
@@ -318,6 +318,8 @@ class BaseStatusBar native ui
 	native void BeginStatusBar(bool forceScaled = false, int resW = -1, int resH = -1, int rel = -1);
 	native void BeginHUD(double Alpha = 1., bool forcescaled = false, int resW = -1, int resH = -1);
 	
+	native void UpdateScreenGeometry();
+
 	virtual void Init() 
 	{
 		mSmallFont = HUDFont.Create("SmallFont");
@@ -330,7 +332,7 @@ class BaseStatusBar native ui
 	native virtual clearscope void SetMugShotState (String state_name, bool wait_till_done=false, bool reset=false);
 
 	virtual void FlashItem (class<Inventory> itemtype) { artiflashTick = 4; itemflashFade = 0.75; }
-	virtual void AttachToPlayer (PlayerInfo player) { CPlayer = player; }
+	virtual void AttachToPlayer (PlayerInfo player) { CPlayer = player; UpdateScreenGeometry(); }
 	virtual void FlashCrosshair () { CrosshairSize = XHAIRPICKUPSIZE; }
 	virtual void NewGame () { if (CPlayer != null) AttachToPlayer(CPlayer); }
 	virtual void ShowPop (int popnum) { ShowLog = (popnum == POP_Log && !ShowLog); }