diff --git a/pkg/mining/bufpool.go b/pkg/mining/bufpool.go
index a1282fc..a0fab2c 100644
--- a/pkg/mining/bufpool.go
+++ b/pkg/mining/bufpool.go
@@ -35,10 +35,10 @@ func MarshalJSON(v interface{}) ([]byte, error) {
 	buf := getBuffer()
 	defer putBuffer(buf)
 
-	enc := json.NewEncoder(buf)
+	encoder := json.NewEncoder(buf)
 	// Don't escape HTML characters (matches json.Marshal behavior for these use cases)
-	enc.SetEscapeHTML(false)
-	if err := enc.Encode(v); err != nil {
+	encoder.SetEscapeHTML(false)
+	if err := encoder.Encode(v); err != nil {
 		return nil, err
 	}