diff --git a/lib/include/srslte/common/security.h b/lib/include/srslte/common/security.h
index 4881abd96..5dc8a6305 100644
--- a/lib/include/srslte/common/security.h
+++ b/lib/include/srslte/common/security.h
@@ -58,11 +58,7 @@ typedef enum{
 static const char integrity_algorithm_id_text[INTEGRITY_ALGORITHM_ID_N_ITEMS][20] = {"EIA0",
                                                                                      "128-EIA1",
                                                                                      "128-EIA2"};
-typedef enum
-{
-  AUTH_OP,
-  AUTH_OPC
-} AUTH_OPERATOR_CODE_TYPE;
+
 
 /******************************************************************************
  * Key Generation
@@ -157,7 +153,6 @@ uint8_t security_128_eea2(uint8_t  *key,
  *****************************************************************************/
 
 uint8_t security_milenage_f1( uint8_t *k,
-                              AUTH_OPERATOR_CODE_TYPE opc_t,
                               uint8_t *op,
                               uint8_t *rand,
                               uint8_t *sqn,
@@ -165,7 +160,6 @@ uint8_t security_milenage_f1( uint8_t *k,
                               uint8_t *mac_a);
 
 uint8_t security_milenage_f1_star( uint8_t *k,
-                                   AUTH_OPERATOR_CODE_TYPE opc_t,
                                    uint8_t *op,
                                    uint8_t *rand,
                                    uint8_t *sqn,
@@ -173,7 +167,6 @@ uint8_t security_milenage_f1_star( uint8_t *k,
                                    uint8_t *mac_s);
 
 uint8_t security_milenage_f2345( uint8_t *k,
-                                 AUTH_OPERATOR_CODE_TYPE opc_t,
                                  uint8_t *op,
                                  uint8_t *rand,
                                  uint8_t *res,
@@ -182,11 +175,11 @@ uint8_t security_milenage_f2345( uint8_t *k,
                                  uint8_t *ak);
 
 uint8_t security_milenage_f5_star( uint8_t *k,
-                                   AUTH_OPERATOR_CODE_TYPE opc_t,
                                    uint8_t *op,
                                    uint8_t *rand,
                                    uint8_t *ak);
 
+
 } // namespace srslte
 
 #endif // SRSLTE_SECURITY_H