diff --git a/gamedata/sdktools.games/engine.l4d2.txt b/gamedata/sdktools.games/engine.l4d2.txt
index 61447281..c3dd3acd 100644
--- a/gamedata/sdktools.games/engine.l4d2.txt
+++ b/gamedata/sdktools.games/engine.l4d2.txt
@@ -196,7 +196,6 @@
 		"#supported"
 		{
 			"game"		"left4dead2"
-			"game"		"nucleardawn"
 		}
 		"Signatures"
 		{
diff --git a/gamedata/sdktools.games/game.nucleardawn.txt b/gamedata/sdktools.games/game.nucleardawn.txt
index 24396381..32edb454 100644
--- a/gamedata/sdktools.games/game.nucleardawn.txt
+++ b/gamedata/sdktools.games/game.nucleardawn.txt
@@ -95,5 +95,17 @@
 		{
 			"GameRulesProxy"	"CNuclearDawnRulesProxy"
 		}
+		
+		"Signatures"
+		{
+			"FireOutput"
+			{
+				"library"	"server"
+				"windows"	"\x81\x2A\x2A\x2A\x2A\x2A\x53\x55\x56\x8B\x2A\x2A\x85"
+				"linux"		"@_ZN17CBaseEntityOutput10FireOutputE9variant_tP11CBaseEntityS2_f"
+				"mac"		"@_ZN17CBaseEntityOutput10FireOutputE9variant_tP11CBaseEntityS2_f"
+			}
+		}
+	}
 	}
 }
\ No newline at end of file