diff --git a/routers/api/v1/repo/repo.go b/routers/api/v1/repo/repo.go
index 9810e461d..436b83adf 100644
--- a/routers/api/v1/repo/repo.go
+++ b/routers/api/v1/repo/repo.go
@@ -637,7 +637,7 @@ func Edit(ctx *context.APIContext) {
 		}
 	}
 
-	if opts.MirrorInterval != nil {
+	if opts.MirrorInterval != nil || opts.EnablePrune != nil {
 		if err := updateMirror(ctx, opts); err != nil {
 			return
 		}