diff --git a/machines/SteamDeck/configuration.nix b/machines/SteamDeck/configuration.nix
index 74f5487..db30aa7 100755
--- a/machines/SteamDeck/configuration.nix
+++ b/machines/SteamDeck/configuration.nix
@@ -50,6 +50,14 @@
 			autoStart = true;
 			user = "toast";
 			desktopSession = "plasmawayland";
+			environment = {
+				/*
+				Steam already has a mangohud overlay, so this
+				avoids having two overlays at once
+				*/
+				MANGOHUD = "0";
+				MANHOGUD_DLSYM = "0";
+			};
 		};
 		decky-loader = {
 			enable = true;