diff --git a/commandline.cpp b/commandline.cpp
index 879a30f1..14ca5944 100644
--- a/commandline.cpp
+++ b/commandline.cpp
@@ -394,6 +394,12 @@ int arg::readCommon() {
     exit(0);
     }
   else if(argis("")) {}
+  else if(argis("-deck")) {
+    if(!detect_deck) printf("warning: -deck option after reading config\n");
+    detect_deck = false;
+    shift();
+    running_on_deck = argi();
+    }
   else if(argis("-help") || argis("-h")) {
     printf("\nCommandline help follows. If you meant in-game help, press F1 while playing.\n\n");
     printf("Some commadline options automatically enable the cheat mode.\n");
@@ -416,6 +422,7 @@ int arg::readCommon() {
     printf("  -nogui             - do not start the GUI\n");
     printf("  -run               - run (before handling other options) until the user presses F10\n");
     printf("  -exit              - exit the program\n");
+    printf("  -deck n            - disable SteamDeck auto-detection (`-deck 0` sets not deck, `-deck 1` sets deck)\n");
 
     printf("\nFile options:\n");
     printf("  -c FILE            - use the specified configuration file\n");
diff --git a/config.cpp b/config.cpp
index 40c6e0a4..dad674da 100644
--- a/config.cpp
+++ b/config.cpp
@@ -1126,15 +1126,17 @@ EX void font_reaction() {
   }
 #endif
 
+EX bool running_on_deck = false;
+EX bool detect_deck = true;
+
 EX void initConfig() {
   
   DEBBI(debug_init_config, ("initconfig"));
 
   bool qm = !ISPANDORA;
-  bool deck = false;
 
   #if ISLINUX
-  if(1) {
+  if(detect_deck) {
     string name = "", vendor = "";
     if(1) {
       fhstream f("/sys/devices/virtual/dmi/id/board_name", "rt");
@@ -1145,15 +1147,17 @@ EX void initConfig() {
       if(f.f) vendor = scanline_noblank(f);
       }
     if(vendor.find("Valve") != string::npos && (name.find("Jupiter") != string::npos || name.find("Galileo") != string::npos))
-      deck = true;
+      running_on_deck = true;
     }
   #endif
 
   #if ISSTEAM
-  if(is_steamdeck()) deck = true;
+  if(detect_deck && is_steamdeck()) running_on_deck = true;
   #endif
 
-  if(deck) {
+  detect_deck = false;
+
+  if(running_on_deck) {
     centered_menus = true;
     lands_per_page = 18;
     dialog::onscreen_keyboard = true;
@@ -1449,9 +1453,9 @@ EX void initConfig() {
   ->editable("vsync", 'v');
   #endif
   
-  param_b(vid.want_fullscreen, "fullscreen", deck ? true : false)
+  param_b(vid.want_fullscreen, "fullscreen", running_on_deck ? true : false)
   ->editable("fullscreen mode", 'f');
-  param_b(vid.change_fullscr, "fullscreen_change", deck ? true : false)
+  param_b(vid.change_fullscr, "fullscreen_change", running_on_deck ? true : false)
   ->editable("use specific fullscreen resolution", 'g');
   param_b(vid.relative_window_size, "window_relative", true)
   ->editable("specify relative window size", 'g');
@@ -1466,7 +1470,7 @@ EX void initConfig() {
     dialog::bound_low(dialog::get_ne().vmin);
     dialog::get_di().reaction_final = do_request_resolution_change; });
   
-  param_i(vid.fullscreen_y, "fullscreen_y", deck ? 800 : 1024)
+  param_i(vid.fullscreen_y, "fullscreen_y", running_on_deck ? 800 : 1024)
   -> editable(480, 2160, 1, "fullscreen resolution to use (Y)", "", 'x')
   -> set_sets([] {
     dialog::scale_given(get_display_modes('y'));
@@ -1477,15 +1481,15 @@ EX void initConfig() {
   -> editable(160, 3840, 40, "window resolution to use (X)", "", 'x')
   -> set_sets([] { dialog::bound_low(160); dialog::get_di().reaction_final = do_request_resolution_change; });
 
-  param_i(vid.window_y, "window_y", deck ? 800 : 1024)
+  param_i(vid.window_y, "window_y", running_on_deck ? 800 : 1024)
   -> editable(120, 2160, 40, "window resolution to use (Y)", "", 'x')
   -> set_sets([] { dialog::bound_low(120); dialog::get_di().reaction_final = do_request_resolution_change; });
 
-  param_f(vid.window_rel_x, "window_rel_x", deck ? 1 : .9)
+  param_f(vid.window_rel_x, "window_rel_x", running_on_deck ? 1 : .9)
   -> editable(.1, 1, .1, "screen size percentage to use (X)", "", 'x')
   -> set_sets([] { dialog::bound_low(.1); dialog::get_di().reaction_final = do_request_resolution_change; });
 
-  param_f(vid.window_rel_y, "window_rel_y", deck ? 1 : .9)
+  param_f(vid.window_rel_y, "window_rel_y", running_on_deck ? 1 : .9)
   -> editable(.1, 1, .1, "screen size percentage to use (Y)", "", 'x')
   -> set_sets([] { dialog::bound_low(.1); dialog::get_di().reaction_final = do_request_resolution_change; });