diff --git a/eth/protocols/eth/handlers.go b/eth/protocols/eth/handlers.go
index 09b0341f1a..7556df9af2 100644
--- a/eth/protocols/eth/handlers.go
+++ b/eth/protocols/eth/handlers.go
@@ -329,6 +329,8 @@ func serviceGetReceiptsQuery70(chain *core.BlockChain, query GetReceiptsRequest,
 			continue
 		}
 		if results == nil {
+			// This case triggers when the first receipt of the block receipts list doesn't
+			// fit. We don't append anything to the response here and consider it finished.
 			break
 		}
 		receipts.AppendRaw(results)