diff --git a/octoprint/printer.py b/octoprint/printer.py
index d5b56fa2..d5fc445f 100644
--- a/octoprint/printer.py
+++ b/octoprint/printer.py
@@ -175,7 +175,7 @@ class Printer():
 			self._comm.sendCommand(command)
 
 	def selectFile(self, filename, sd, printAfterSelect=False):
-		if self._comm is not None and (self._comm.isBusy() or self._comm.isStreaming()):
+		if self._comm is None or (self._comm.isBusy() or self._comm.isStreaming()):
 			return
 
 		self._printAfterSelect = printAfterSelect