diff --git a/lutris/runners/winesteam.py b/lutris/runners/winesteam.py
index 17dea0242..48d212867 100644
--- a/lutris/runners/winesteam.py
+++ b/lutris/runners/winesteam.py
@@ -89,7 +89,9 @@ class winesteam(wine):
         self.arguments = []
         self.game_options = [
             {'option': 'appid', 'type': 'string', 'label': 'appid'},
-            {'option': 'args', 'type': 'string', 'label': 'arguments'}
+            {'option': 'args', 'type': 'string', 'label': 'arguments'},
+            {'option': 'prefix', 'type': 'directory_chooser',
+             'label': 'Prefix'}
         ]
         self.settings = settings
 
@@ -179,6 +181,12 @@ class winesteam(wine):
                     'runner': self.__class__.__name__}
 
         self.prepare_launch()
+
+        command = []
+        prefix = self.settings['game'].get('prefix', "")
+        if os.path.exists(prefix):
+            command.append("WINEPREFIX=\"%s\" " % prefix)
+        command.append(self.launch_args)
         return {
-            'command': self.launch_args + ['-applaunch', appid, self.args]
+            'command': command + ['-applaunch', appid, self.args]
         }