diff --git a/backend/smb/smb.go b/backend/smb/smb.go
index 704c998f9..37ac06554 100644
--- a/backend/smb/smb.go
+++ b/backend/smb/smb.go
@@ -177,6 +177,7 @@ func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, e
 		CaseInsensitive:         opt.CaseInsensitive,
 		CanHaveEmptyDirectories: true,
 		BucketBased:             true,
+		PartialUploads:          true,
 	}).Fill(ctx, f)
 
 	f.pacer = fs.NewPacer(ctx, pacer.NewDefault(pacer.MinSleep(minSleep), pacer.MaxSleep(maxSleep), pacer.DecayConstant(decayConstant)))