diff --git a/src/limedriver/limedriver.pyx b/src/limedriver/limedriver.pyx
index 9bda00b..c47e190 100644
--- a/src/limedriver/limedriver.pyx
+++ b/src/limedriver/limedriver.pyx
@@ -723,6 +723,6 @@ def get_device_list():
     cdef vector[string] devices = getDeviceList()
     return [device.decode('utf-8') for device in devices] 
 
-def get_channels_for_device(device):
+def get_channels_for_device(device = ""):
     cdef pair[int, int] channels = getChannelsFromInfo(device)
     return channels.first, channels.second