diff --git a/src/octoprint/printer/standard.py b/src/octoprint/printer/standard.py
index b71698aa..229adcd2 100644
--- a/src/octoprint/printer/standard.py
+++ b/src/octoprint/printer/standard.py
@@ -918,6 +918,7 @@ class Printer(PrinterInterface, comm.MachineComPrintCallback):
 		"""
 		oldState = self._state
 
+		state_string = None
 		if self._comm is not None:
 			state_string = self._comm.getStateString()