diff --git a/tools/mpremote/mpremote/pyboardextended.py b/tools/mpremote/mpremote/pyboardextended.py
index dba8172b84..6bad94a561 100644
--- a/tools/mpremote/mpremote/pyboardextended.py
+++ b/tools/mpremote/mpremote/pyboardextended.py
@@ -1,4 +1,4 @@
-import io, os, re, serial, struct, time
+import io, os, re, struct, time
 from errno import EPERM
 from .console import VT_ENABLED