diff --git a/engines/classic-rbdoom-3-bfg/assets/run-classic-rbdoom-3-bfg.sh b/engines/classic-rbdoom-3-bfg/assets/run-classic-rbdoom-3-bfg.sh
index 5e4120b0c..01cdbe743 100755
--- a/engines/classic-rbdoom-3-bfg/assets/run-classic-rbdoom-3-bfg.sh
+++ b/engines/classic-rbdoom-3-bfg/assets/run-classic-rbdoom-3-bfg.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+export SteamDeck=""
+unset SteamDeck
+
 create_relative_symlink () {
     local -r target=$1
     local -r symlink="classic/$target"