diff --git a/types/header.go b/types/header.go
index f7b1e688a7..d3367741eb 100644
--- a/types/header.go
+++ b/types/header.go
@@ -28,7 +28,7 @@ type Header struct {
 	Hash         Hash
 
 	// BaseFee was added by EIP-1559 and is ignored in legacy headers.
-	BaseFee uint64
+	BaseFee uint64 `json:"baseFeePerGas"`
 }
 
 func (h *Header) Equal(hh *Header) bool {