diff --git a/src/octoprint/util/comm.py b/src/octoprint/util/comm.py
index 23c34a1f..f1ee6be0 100644
--- a/src/octoprint/util/comm.py
+++ b/src/octoprint/util/comm.py
@@ -1867,7 +1867,7 @@ class MachineCom(object):
 		elif len(potentials) > 1:
 			programmer = stk500v2.Stk500v2()
 
-			for p in serialList():
+			for p in potentials:
 				serial_obj = None
 
 				try: