diff --git a/include/nuttx/wireless/ieee802154/ieee802154_mac.h b/include/nuttx/wireless/ieee802154/ieee802154_mac.h
index 838f7fcafd..76880ebf29 100644
--- a/include/nuttx/wireless/ieee802154/ieee802154_mac.h
+++ b/include/nuttx/wireless/ieee802154/ieee802154_mac.h
@@ -356,7 +356,7 @@ struct ieee802154_addr_s
   {
     uint16_t saddr;     /* short address */
     uint8_t  eaddr[8];  /* extended address */
-  };
+  } u;
 };
 
 #define IEEE802154_ADDRSTRLEN 22 /* (2*2+1+8*2, PPPP/EEEEEEEEEEEEEEEE) */
@@ -430,7 +430,7 @@ struct ieee802154_data_req_s
     uint8_t ack_tx      : 1;  /* Acknowledge TX? */               
     uint8_t gts_tx      : 1;  /* 1=GTS used for TX, 0=CAP used for TX */
     uint8_t indirect_tx : 1;  /* Should indirect transmission be used? */
-  };
+  } msdu_flags;
 
 #ifdef CONFIG_IEEE802154_SECURITY
   /* Security information if enabled */
@@ -566,8 +566,8 @@ struct ieee802154_pend_addr_s
       uint8_t reserved_3      : 1;  /* Reserved bit */
       uint8_t num_ext_addr    : 3;  /* Number of extended addresses pending */       
       uint8_t reserved_7      : 1;  /* Reserved bit */
-    };
-  };
+    } pa_addr;
+  } u;
   struct ieee802154_addr_s addr[7]; /* Array of at most 7 addresses */
 };
 
diff --git a/wireless/ieee802154/mac802154.c b/wireless/ieee802154/mac802154.c
index 8dc2e87b3f..ee057dcec1 100644
--- a/wireless/ieee802154/mac802154.c
+++ b/wireless/ieee802154/mac802154.c
@@ -482,7 +482,7 @@ int mac802154_req_data(MACHANDLE mac, FAR struct ieee802154_data_req_s *req)
    * 5.1.6.4 [1] pg. 118.
    */
 
-  mhr.frame_ctrl |= (req->ack_tx << IEEE802154_FRAMECTRL_SHIFT_ACKREQ);
+  mhr.frame_ctrl |= (req->msdu_flags.ack_tx << IEEE802154_FRAMECTRL_SHIFT_ACKREQ);
 
   /* If the destination address is present, copy the PAN ID and one of the
    * addresses, depending on mode, into the MHR .
@@ -603,7 +603,7 @@ int mac802154_req_data(MACHANDLE mac, FAR struct ieee802154_data_req_s *req)
    * [1] pg. 118.
    */
 
-  if (req->gts_tx)
+  if (req->msdu_flags.gts_tx)
     {
       /* TODO: Support GTS transmission. This should just change where we link
        * the transaction.  Instead of going in the CSMA transaction list, it
@@ -622,7 +622,7 @@ int mac802154_req_data(MACHANDLE mac, FAR struct ieee802154_data_req_s *req)
        * described in 5.1.5 and 5.1.6.3. [1]
        */
 
-      if (req->indirect_tx)
+      if (req->msdu_flags.indirect_tx)
         {
           /* If the TxOptions parameter specifies that an indirect transmission
            * is required and if the device receiving this primitive is not a
@@ -642,13 +642,13 @@ int mac802154_req_data(MACHANDLE mac, FAR struct ieee802154_data_req_s *req)
             {
               /* Override the setting since it wasn't valid */
 
-              req->indirect_tx = 0;
+              req->msgu_flags.indirect_tx = 0;
             }
         }
 
       /* If this is a direct transmission not during a GTS */
 
-      if (!req->indirect_tx)
+      if (!req->msdu_flags.indirect_tx)
         {
           /* Link the transaction into the CSMA transaction list */