diff --git a/src/compatibility.cpp b/src/compatibility.cpp
index 839d60dc52..4a4f19d6be 100644
--- a/src/compatibility.cpp
+++ b/src/compatibility.cpp
@@ -80,6 +80,7 @@ enum
 	CP_SETACTIVATION,
 	CP_SECTORFLOOROFFSET,
 	CP_SETWALLYSCALE,
+	CP_SETTHINGZ,
 };
 
 // EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
@@ -89,6 +90,7 @@ enum
 // PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
 
 // EXTERNAL DATA DECLARATIONS ----------------------------------------------
+extern TArray<FMapThing> MapThingsConverted;
 
 // PUBLIC DATA DEFINITIONS -------------------------------------------------
 
@@ -294,6 +296,15 @@ void ParseCompatibility()
 				sc.MustGetFloat();
 				CompatParams.Push(FLOAT2FIXED(sc.Float));
 			}
+			else if (sc.Compare("setthingz"))
+			{
+				if (flags.ExtCommandIndex == ~0u) flags.ExtCommandIndex = CompatParams.Size();
+				CompatParams.Push(CP_SETTHINGZ);
+				sc.MustGetNumber();
+				CompatParams.Push(sc.Number);
+				sc.MustGetFloat();
+				CompatParams.Push(FLOAT2FIXED(sc.Float));
+			}
 			else 
 			{
 				sc.UnGet();
@@ -497,6 +508,16 @@ void SetCompatibilityParams()
 					i += 5;
 					break;
 				}
+				case CP_SETTHINGZ:
+				{
+					// When this is called, the things haven't been spawned yet so we can alter the position inside the MapThings array.
+					if ((unsigned)CompatParams[i+1] < MapThingsConverted.Size())
+					{
+						MapThingsConverted[CompatParams[i+1]].z = CompatParams[i+2];
+					}
+					i += 3;
+					break;
+				}	
 			}
 		}
 	}
diff --git a/wadsrc/static/compatibility.txt b/wadsrc/static/compatibility.txt
index 1a115fbe8c..a84ba218b7 100644
--- a/wadsrc/static/compatibility.txt
+++ b/wadsrc/static/compatibility.txt
@@ -1,5 +1,31 @@
 6DC9F6CCEAE7A91AEC48EBE506F22BC4 // void.wad MAP01
 {
+	// Slightly squash the pillars in the starting room with "stimpacks"
+	// floating on them so that they can be obtained.
+	sectorflooroffset 62 -8
+	setwallyscale 286 front bot 1.090909
+	setwallyscale 287 front bot 1.090909
+	setwallyscale 288 front bot 1.090909
+	setwallyscale 289 front bot 1.090909
+	
+	sectorflooroffset 63 -8
+	setwallyscale 290 front bot 1.090909
+	setwallyscale 291 front bot 1.090909
+	setwallyscale 292 front bot 1.090909
+	setwallyscale 293 front bot 1.090909
+	
+	sectorflooroffset 118 -8
+	setwallyscale 710 front bot 1.090909
+	setwallyscale 711 front bot 1.090909
+	setwallyscale 712 front bot 1.090909
+	setwallyscale 713 front bot 1.090909
+	
+	sectorflooroffset 119 -8
+	setwallyscale 714 front bot 1.090909
+	setwallyscale 715 front bot 1.090909
+	setwallyscale 716 front bot 1.090909
+	setwallyscale 717 front bot 1.090909
+
 	setslopeoverflow
 }
 
@@ -306,34 +332,6 @@ F481922F4881F74760F3C0437FD5EDD0 // map03
 	setactivation 455 16		// SPAC_Push
 }
 
-6DC9F6CCEAE7A91AEC48EBE506F22BC4 // Void
-{
-	// Slightly squash the pillars in the starting room with "stimpacks"
-	// floating on them so that they can be obtained.
-	sectorflooroffset 62 -8
-	setwallyscale 286 front bot 1.090909
-	setwallyscale 287 front bot 1.090909
-	setwallyscale 288 front bot 1.090909
-	setwallyscale 289 front bot 1.090909
-	
-	sectorflooroffset 63 -8
-	setwallyscale 290 front bot 1.090909
-	setwallyscale 291 front bot 1.090909
-	setwallyscale 292 front bot 1.090909
-	setwallyscale 293 front bot 1.090909
-	
-	sectorflooroffset 118 -8
-	setwallyscale 710 front bot 1.090909
-	setwallyscale 711 front bot 1.090909
-	setwallyscale 712 front bot 1.090909
-	setwallyscale 713 front bot 1.090909
-	
-	sectorflooroffset 119 -8
-	setwallyscale 714 front bot 1.090909
-	setwallyscale 715 front bot 1.090909
-	setwallyscale 716 front bot 1.090909
-	setwallyscale 717 front bot 1.090909
-}
 
 65A1EB4C87386F290816660A52932FF1 // Master Levels, garrison.wad
 {
@@ -349,3 +347,9 @@ F481922F4881F74760F3C0437FD5EDD0 // map03
 	setlinespecial 397 NoiseAlert 0 0 0 0 0
 	setlinespecial 411 NoiseAlert 0 0 0 0 0
 }
+
+952CC8D03572E17BA550B01B366EFBB9 // Cheogsh map01
+{
+	// make the blue key spawn above the 3D floor
+	setthingz 918 296
+}