diff --git a/wadsrc/static/compatibility.txt b/wadsrc/static/compatibility.txt
index c48fa27ebe..9275eec682 100644
--- a/wadsrc/static/compatibility.txt
+++ b/wadsrc/static/compatibility.txt
@@ -566,3 +566,56 @@ DC96228097DD004C40CCB1DB14A91EAA // unloved.pk3:unlovedmaps.wad map05
 	clipmidtex
 }
 
+
+// Cosmetic fixes for Heretic: Shadow of the Serpent Riders
+D94587625BA779644D58151A87897CF1 // e1m2
+{
+	// Missing textures
+	setwalltexture 477 back top MOSSRCK1
+	setwalltexture 478 back top MOSSRCK1
+	setwalltexture 479 back top MOSSRCK1
+	setwalltexture 1057 front top MOSSRCK1
+}
+ADD0FAC41AFB0B3C9B9F3C0006F93805 // e1m3
+{
+	// Broken door between the hallway that leads to a Torch 
+	// and the passage that has a Bag of Holding at its end
+	setsectoroffset 86 floor -128
+	setsectoroffset 86 ceil -128
+}
+916318D8B06DAC2D83424B23E4B66531 // e1m4
+{
+	// Wrong sector offsets
+	setsectoroffset 0 ceil 8
+	setsectoroffset 1 ceil 8
+	setsectoroffset 2 ceil 8
+	setsectoroffset 3 ceil 8
+	setsectoroffset 4 ceil 8
+	setsectoroffset 6 ceil 8
+	setsectoroffset 6 floor 8
+	setsectoroffset 17 ceil 8
+	// Yellow key door
+	setsectoroffset 284 floor -8
+	setsectoroffset 284 ceil -8
+	// Missing textures
+	setwalltexture 490 back bot GRSTNPB
+	setwalltexture 722 front bot WOODWL
+	setwalltexture 911 front bot WOODWL
+	setwalltexture 1296 front bot WOODWL
+}
+397A0E17A39542E4E8294E156FAB0502 // e2m2
+{
+	// Missing green door statues on easy and hard difficulties
+	setthingskills 17 31
+	setthingskills 18 31
+}
+CA3773ED313E8899311F3DD0CA195A68 // e3m6
+{
+	// Quartz flask outside of map
+	setthingskills 373 0
+	// Missing wall torch on hard difficulty
+	setthingskills 448 31
+	// Missing textures
+	setwalltexture 343 front top MOSSRCK1
+	setwalltexture 370 front top MOSSRCK1
+}