diff --git a/GPX b/GPX
index 686ace7..8e97402 160000
--- a/GPX
+++ b/GPX
@@ -1 +1 @@
-Subproject commit 686ace74851f88812e20d3ba236fa3fd431760ce
+Subproject commit 8e97402e0c2e5b2defc971951c728fa449509206
diff --git a/octoprint_GPX/__init__.py b/octoprint_GPX/__init__.py
index c79e558..52cd8d9 100644
--- a/octoprint_GPX/__init__.py
+++ b/octoprint_GPX/__init__.py
@@ -115,7 +115,7 @@ def serial_factory(self, comm, port, baudrate, timeout, *args, **kwargs):
 				try:
 					import glob
 					ports = glob.glob("/dev/serial/by-id/*MakerBot_Industries_The_Replicator*")
-					if ports is not None:
+					if ports:
 						port = os.path.normpath(os.path.join("/dev/serial/by-id/", os.readlink(ports[0])))
 				except:
 					# oh well, it was worth a try