diff --git a/client/src/loclass/ikeys.h b/client/src/loclass/ikeys.h
index 4fceda95f..511a3a5af 100644
--- a/client/src/loclass/ikeys.h
+++ b/client/src/loclass/ikeys.h
@@ -60,7 +60,7 @@ int doKeyTests(void);
  * @param div_key
  */
 
-void diversifyKey(uint8_t csn[8], uint8_t key[8], uint8_t div_key[8]);
+void diversifyKey(uint8_t *csn, uint8_t *key, uint8_t *div_key);
 /**
  * @brief Permutes a key from standard NIST format to Iclass specific format
  * @param key