diff --git a/serial/serialutil.py b/serial/serialutil.py
index de75ec0..3bf30f5 100644
--- a/serial/serialutil.py
+++ b/serial/serialutil.py
@@ -534,6 +534,9 @@
     def getCD(self):
         return self.cd
 
+    def setPort(self, port):
+        self.port = port
+
     @property
     def writeTimeout(self):
         return self.write_timeout