diff --git a/core/types/receipt.go b/core/types/receipt.go
index b8c1a2530..b627f46a4 100644
--- a/core/types/receipt.go
+++ b/core/types/receipt.go
@@ -41,9 +41,6 @@ var (
 // This error is returned when a typed receipt is decoded, but the string is empty.
 var errEmptyTypedReceipt = errors.New("empty typed receipt bytes")
 
-// This error is returned when a typed receipt has an unsupported type
-var errRctTypeNotSupported = errors.New("receipt type not supported")
-
 const (
 	// ReceiptStatusFailed is the status code of a transaction if execution failed.
 	ReceiptStatusFailed = uint64(0)
diff --git a/params/version.go b/params/version.go
index 093065668..0ec9c1beb 100644
--- a/params/version.go
+++ b/params/version.go
@@ -24,7 +24,7 @@ const (
 	VersionMajor = 1                  // Major version component of the current release
 	VersionMinor = 10                 // Minor version component of the current release
 	VersionPatch = 2                  // Patch version component of the current release
-	VersionMeta  = "statediff-0.0.20" // Version metadata to append to the version string
+	VersionMeta  = "statediff-0.0.21" // Version metadata to append to the version string
 )
 
 // Version holds the textual version string.