diff --git a/weed/storage/disk_location_ec.go b/weed/storage/disk_location_ec.go
index 983865424..ace6ddc15 100644
--- a/weed/storage/disk_location_ec.go
+++ b/weed/storage/disk_location_ec.go
@@ -2,6 +2,7 @@ package storage
 
 import (
 	"fmt"
+	"math"
 	"os"
 	"path"
 	"regexp"
@@ -124,6 +125,11 @@ func (l *DiskLocation) loadEcShards(shards []string, collection string, vid need
 			return fmt.Errorf("failed to parse ec shard name %v: %w", shard, err)
 		}
 
+		// Bounds check for uint8 (ShardId)
+		if shardId < 0 || shardId > int64(math.MaxUint8) {
+			return fmt.Errorf("ec shard id %v out of bounds for uint8 in shard name %v", shardId, shard)
+		}
+
 		_, err = l.LoadEcShard(collection, vid, erasure_coding.ShardId(shardId), generation)
 		if err != nil {
 			return fmt.Errorf("failed to load ec shard %v: %w", shard, err)