diff --git a/blockservice/blockservice.go b/blockservice/blockservice.go
index 6f0f78f8b..cf730a563 100644
--- a/blockservice/blockservice.go
+++ b/blockservice/blockservice.go
@@ -71,6 +71,8 @@ type BoundedBlockService interface {
 	Allowlist() verifcid.Allowlist
 }
 
+var _ BoundedBlockService = (*blockService)(nil)
+
 type blockService struct {
 	allowlist  verifcid.Allowlist
 	blockstore blockstore.Blockstore