diff --git a/internal/datacoord/segment_manager.go b/internal/datacoord/segment_manager.go
index bdcda75015..fb9cb58332 100644
--- a/internal/datacoord/segment_manager.go
+++ b/internal/datacoord/segment_manager.go
@@ -86,6 +86,9 @@ type Allocation struct {
 	ExpireTime Timestamp
 }
 
+// make sure SegmentManager implements Manager
+var _ Manager = (*SegmentManager)(nil)
+
 // SegmentManager handles segment related logic
 type SegmentManager struct {
 	meta                *meta