diff --git a/pkg/storage/donut/data/data_v1/data.go b/pkg/storage/donut/data/data_v1/data.go
index 41504e873..3f8d7a33f 100644
--- a/pkg/storage/donut/data/data_v1/data.go
+++ b/pkg/storage/donut/data/data_v1/data.go
@@ -18,8 +18,8 @@ const (
 
 type EncoderParams struct {
 	Length    int
-	K         int
-	M         int
+	K         uint8
+	M         uint8
 	Technique EncoderTechnique
 }