diff --git a/src/support/Systemcall.cpp b/src/support/Systemcall.cpp
index 1a23f93c06..170a85a349 100644
--- a/src/support/Systemcall.cpp
+++ b/src/support/Systemcall.cpp
@@ -415,8 +415,10 @@ void SystemcallPrivate::processStarted()
 
 void SystemcallPrivate::processFinished(int, QProcess::ExitStatus)
 {
-	state = Finished;
-	ProgressInterface::instance()->processFinished(cmd_);
+	if (state != Finished) {
+		state = Finished;
+		ProgressInterface::instance()->processFinished(cmd_);
+	}
 }