diff --git a/src/octoprint/util/comm.py b/src/octoprint/util/comm.py
index b52f3d8b..e1dd676f 100644
--- a/src/octoprint/util/comm.py
+++ b/src/octoprint/util/comm.py
@@ -1027,7 +1027,7 @@ class MachineCom(object):
 
 								if self._sendFromQueue(sendChecksum=True):
 									pass
-								else:
+								elif not self.isSdPrinting():
 									self._sendNext()
 					elif line.lower().startswith("resend") or line.lower().startswith("rs"):
 						if settings().get(["feature", "swallowOkAfterResend"]):