diff --git a/gps_vcones/vcones_gui.py b/gps_vcones/vcones_gui.py
index cab0e51..2a7bf06 100755
--- a/gps_vcones/vcones_gui.py
+++ b/gps_vcones/vcones_gui.py
@@ -70,7 +70,7 @@ def roydistance(lat1, lon1, lat2, lon2):
 cfg = ConfigurationFile(__file__)
 
 if not os.path.isdir("logs"):
-  mkdir("logs")
+  os.mkdir("logs")
 
 ##############################################################################
 # virtual cones