diff --git a/docs/installers.rst b/docs/installers.rst
index 4f6ad9feb..1135dcb52 100644
--- a/docs/installers.rst
+++ b/docs/installers.rst
@@ -978,16 +978,12 @@ Sysoptions
 
 ``quit_steam_on_exit`` (example: ``true``)
 
-``steamless_binary64`` (example: fallout64-nosteam)
-
 ``steamless_binary`` (example: fallout-nosteam)
 
 ``run_without_steam`` (example: ``true``)
 
 **steam section:**
 
-``steamless_binary64`` (example: fallout64-nosteam)
-
 ``steamless_binary`` (example: fallout-nosteam)
 
 ``run_without_steam`` (example: ``true``)
diff --git a/lutris/installer/interpreter.py b/lutris/installer/interpreter.py
index 60ebd2290..795abff45 100644
--- a/lutris/installer/interpreter.py
+++ b/lutris/installer/interpreter.py
@@ -724,12 +724,6 @@ class ScriptInterpreter(CommandsMixin):
                 raise ScriptingError("Invalid 'game' section", self.script["game"])
             config["game"] = self._substitute_config(config["game"])
 
-            # steamless_binary64 can be used to specify 64 bit non-steam binaries
-            if system.LINUX_SYSTEM.is_64_bit and "steamless_binary64" in config["game"]:
-                config["game"]["steamless_binary"] = config["game"][
-                    "steamless_binary64"
-                ]
-
         yaml_config = yaml.safe_dump(config, default_flow_style=False)
         with open(config_filename, "w") as config_file:
             config_file.write(yaml_config)