diff --git a/building_manager.py b/building_manager.py
index ee57f3c02b96798e9274ef377326da6c69f21b37..6c1b0a1d89693b0f57a8b8515a556add52858b99 100755
--- a/building_manager.py
+++ b/building_manager.py
@@ -1418,10 +1418,10 @@ def device_menu(args):
         base_dir = os.getcwd()
 
     # Check if device scripts are installed
-    bin_path = 'usr/bin/enable-swarm-device'
+    bin_path = '/usr/bin/enable-swarm-device'
 
     choices = ['Install device scripts']
-    if not os.path.exists(bin_path):
+    if os.path.exists(bin_path):
         choices.append('Link device to service')
 
     choices.append('Exit')