diff --git a/demo/demo.py b/demo/demo.py
index ae96d143..fb781181 100755
--- a/demo/demo.py
+++ b/demo/demo.py
@@ -234,12 +234,12 @@ def demoShowcase(root=None, border=True):
 
 def main():
     parser = argparse.ArgumentParser()
-    parser.add_argument('-f', help='Full Screen (default)', action='store_true')
-    parser.add_argument('-w', help='Windowed',    action='store_true')
-    parser.add_argument('-t', help='Track Mouse', action='store_true')
+    parser.add_argument('-f', help="Full Screen (default)", action='store_true')
+    parser.add_argument('-w', help="Windowed",              action='store_true')
+    parser.add_argument('-t', help="Don't Track Mouse",     action='store_true')
     args = parser.parse_args()
     windowed = args.w
-    mouseTrack = args.t
+    mouseTrack = not args.t
 
     root = ttk.TTk(title="pyTermTk Demo", mouseTrack=mouseTrack)
     if windowed: