diff --git a/scam.py b/scam.py
index 66118b1..41e5683 100755
--- a/scam.py
+++ b/scam.py
@@ -225,7 +225,7 @@ class MainPanel(wx.Panel):
 
     def on_screenpanel(self, event):
         cam = self.camera
-        cmd = f"screen_panel -persist -cam={cam}"
+        cmd = f"screen_panel -persist -cam {cam}"
         print(cmd)
         subprocess.Popen(cmd.split(), start_new_session=True)