diff --git a/backend/main.go b/backend/main.go
index 0058b83e..d41631f3 100644
--- a/backend/main.go
+++ b/backend/main.go
@@ -101,8 +101,8 @@ func main() {
 	launchWorkers()
 
 	log.Println("Creating submission directory...")
-	if _, err := os.Stat(SubmissionDir); os.IsNotExist(err) {
-		if err := os.MkdirAll(SubmissionDir, 0777); err != nil {
+	if _, err := os.Stat(path.Join(SubmissionDir, ".tmp")); os.IsNotExist(err) {
+		if err := os.MkdirAll(path.Join(SubmissionDir, ".tmp"), 0777); err != nil {
 			log.Fatal("Unable to create submission directory: ", err)
 		}
 	}