diff --git a/changelog/unreleased/zero-byte-uploads.md b/changelog/unreleased/zero-byte-uploads.md
new file mode 100644
index 0000000000..d1ada78e11
--- /dev/null
+++ b/changelog/unreleased/zero-byte-uploads.md
@@ -0,0 +1,5 @@
+Bugfix: Zero byte uploads
+
+Zero byte uploads would trigger postprocessing which lead to breaking pipelines.
+
+https://github.com/cs3org/reva/pull/4778
diff --git a/pkg/storage/utils/decomposedfs/upload/upload.go b/pkg/storage/utils/decomposedfs/upload/upload.go
index d540dbf142..92c9438f7e 100644
--- a/pkg/storage/utils/decomposedfs/upload/upload.go
+++ b/pkg/storage/utils/decomposedfs/upload/upload.go
@@ -171,7 +171,7 @@ func (session *OcisSession) FinishUpload(ctx context.Context) error {
 	metrics.UploadProcessing.Inc()
 	metrics.UploadSessionsBytesReceived.Inc()
 
-	if session.store.pub != nil {
+	if session.store.pub != nil && session.info.Size > 0 {
 		u, _ := ctxpkg.ContextGetUser(ctx)
 		s, err := session.URL(ctx)
 		if err != nil {