diff --git a/wadsrc/static/zscript/base.txt b/wadsrc/static/zscript/base.txt
index 148300d1c..672088f12 100644
--- a/wadsrc/static/zscript/base.txt
+++ b/wadsrc/static/zscript/base.txt
@@ -164,7 +164,7 @@ enum DrawTextureTags
 	DTA_SrcWidth,
 	DTA_SrcHeight,
 	DTA_LegacyRenderStyle,	// takes an old-style STYLE_* constant instead of an FRenderStyle
-
+	DTA_Internal3,
 };
 
 class Shape2D : Object native
@@ -288,6 +288,7 @@ struct Font native
 	native String GetCursor();
 
 	native static int FindFontColor(Name color);
+	native static double GetBottomAlignOffset(int code);
 	native static Font FindFont(Name fontname);
 	native static Font GetFont(Name fontname);
 	native BrokenLines BreakLines(String text, int maxlen);
diff --git a/wadsrc/static/zscript/level_compatibility.txt b/wadsrc/static/zscript/level_compatibility.txt
index c5915427a..3ac3473fd 100644
--- a/wadsrc/static/zscript/level_compatibility.txt
+++ b/wadsrc/static/zscript/level_compatibility.txt
@@ -5,7 +5,8 @@ class LevelCompatibility play
 	{
 		switch (checksum)
 		{			
-			case '9527DD0809FDA39CCFC316A21D135783': // HACX.WAD map05
+			case '9BC9E12781903D7C2D5697A5E0AEFD6F': // HACX.WAD map05 from 21.10.2010
+			case '9527DD0809FDA39CCFC316A21D135783': // HACX.WAD map05 from 20.10.2010
 			{
 				// fix non-functional self-referencing sector hack.
 				for(int i = 578; i < 582; i++)