diff --git a/adapters/grpc/document_grpc.go b/adapters/grpc/document_grpc.go
index 19fced0d4..9e5111036 100644
--- a/adapters/grpc/document_grpc.go
+++ b/adapters/grpc/document_grpc.go
@@ -122,7 +122,7 @@ func toPbDoc(doc *sdk.Document) (*pb.Document, error) {
 }
 
 func toSdkKey(key *pb.Key) *sdk.Key {
-	if key != nil {
+	if key == nil {
 		return nil
 	}