[Python] Undefined variable: SerialException

I am using the pySerial library to have a Python script log data from an Arduino. I am trying to handle the SerialException when the script cannot connect to the port you provided, and Eclipse says "Undefined variable: SerialException". Is there something I forgot to import?

Code:

try:
ser = serial.Serial(port, 9600)
connected = 1
except SerialException:
print "No connection to the device could be established"

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