diff --git a/fw/htt_ppdu_stats.h b/fw/htt_ppdu_stats.h
index 4e6c719274cd..2a10a2e45591 100644
--- a/fw/htt_ppdu_stats.h
+++ b/fw/htt_ppdu_stats.h
@@ -990,6 +990,21 @@ typedef struct {
     };
     /* Flag to indicate if the channel chosen is 320_1 / 320_2 */
     A_UINT32 chan_type_320mhz;
+
+    /*
+     * BIT [15 :  0] - obss_dur_us reports the remaining OBSS dur when
+     *                 this FES started OTA.
+     * BIT [16 : 16] - oprim indicates M/O primary FES.
+     * BIT [31 : 17] - reserved
+     */
+    union {
+        A_UINT32 reserved__oprim__obss_dur;
+        struct {
+            A_UINT32 obss_dur_us: 16,
+                     oprim:        1,
+                     reserved4:   15;
+        };
+    };
 } htt_ppdu_stats_common_tlv;
 
 #define HTT_PPDU_STATS_USER_COMMON_TLV_TID_NUM_M     0x000000ff