diff --git a/wadsrc/static/compatibility.txt b/wadsrc/static/compatibility.txt
index 4c9576e18..621c4920e 100644
--- a/wadsrc/static/compatibility.txt
+++ b/wadsrc/static/compatibility.txt
@@ -488,6 +488,12 @@ F6EE16F770AD309D608EA0B1F1E249FC // Ultimate Doom, e4m3
 {
 	setsectorspecial 147 0
 }
+0D491365C1B88B7D1B603890100DD03E // doom2.wad map18
+{
+	// missing textures
+	setwalltexture 451 front mid metal
+	setwalltexture 459 front mid metal
+}
 EBDAC00E9D25D884B2C8F4B1F0390539 // doom2.wad map21
 {
 	// push ceiling down in glitchy sectors above the stair switches