diff --git a/src/octoprint/printer/standard.py b/src/octoprint/printer/standard.py
index fe7ed97a..c693b0cd 100644
--- a/src/octoprint/printer/standard.py
+++ b/src/octoprint/printer/standard.py
@@ -763,7 +763,7 @@ class Printer(PrinterInterface, comm.MachineComPrintCallback):
 		"""
 
 		if progress is None or printTime is None or cleanedPrintTime is None:
-			return None
+			return None, None
 
 		dumbTotalPrintTime = printTime / progress
 		estimatedTotalPrintTime = self._estimateTotalPrintTime(progress, cleanedPrintTime)