diff --git a/eth/catalyst/api.go b/eth/catalyst/api.go
index ef1e3aac46..ca4a938674 100644
--- a/eth/catalyst/api.go
+++ b/eth/catalyst/api.go
@@ -571,7 +571,7 @@ func (api *ConsensusAPI) GetBlobsV1(hashes []common.Hash) ([]*engine.BlobAndProo
 		index[hash] = i
 	}
 	for i, sidecar := range sidecars {
-		if res[i] != nil && sidecar == nil {
+		if res[i] != nil || sidecar == nil {
 			// already filled
 			continue
 		}