diff --git a/fw/wmi_unified.h b/fw/wmi_unified.h
index 61d4a1b0e762..5396d0351455 100644
--- a/fw/wmi_unified.h
+++ b/fw/wmi_unified.h
@@ -39817,6 +39817,16 @@ typedef struct {
     };
 } WMI_MAC_PHY_CAPABILITIES_EXT;
 
+/* WMI Maximum Tx/Rx NSS information */
+#define WMI_MAC_PHY_CAPABILITIES_EXT2_MAX_TX_NSS_SET(param, value) \
+    WMI_SET_BITS(param, 0, 4, value)
+#define WMI_MAC_PHY_CAPABILITIES_EXT2_MAX_TX_NSS_GET(dword) \
+    WMI_GET_BITS(dword, 0, 4)
+
+#define WMI_MAC_PHY_CAPABILITIES_EXT2_MAX_RX_NSS_SET(param, value) \
+    WMI_SET_BITS(param, 4, 4, value)
+#define WMI_MAC_PHY_CAPABILITIES_EXT2_MAX_RX_NSS_GET(dword) \
+    WMI_GET_BITS(dword, 4, 4)
 
 typedef struct {
     A_UINT32 tlv_header; /* TLV tag and len; tag equals WMITLV_TAG_STRUC_WMI_MAC_PHY_CAPABILITIES_EXT2 */
@@ -39875,6 +39885,21 @@ typedef struct {
     };
     wmi_ppe_threshold uhr_ppet2G;
     wmi_ppe_threshold uhr_ppet5G;
+
+    /* nss_info:
+     * Bits  3:0  - Maximum suported Tx NSS
+     * Bits  7:4  - Maximum suported Rx NSS
+     * Bits 31:8  - Reserved
+     */
+    union {
+        A_UINT32 nss_info;
+        struct {
+            A_UINT32
+                max_tx_nss: 4,
+                max_rx_nss: 4,
+                reserved2: 24;
+        };
+    };
 } WMI_MAC_PHY_CAPABILITIES_EXT2;
 
 #define WMI_CAP_EXT2_PDEV_TO_LINK_MAP_PDEV_ID_GET(pdev_to_link_map_word32) \
diff --git a/fw/wmi_version.h b/fw/wmi_version.h
index 5e15bc07cc4f..a53be073dbbe 100644
--- a/fw/wmi_version.h
+++ b/fw/wmi_version.h
@@ -37,7 +37,7 @@
 #define __WMI_VER_MINOR_    0
 /** WMI revision number has to be incremented when there is a
  *  change that may or may not break compatibility. */
-#define __WMI_REVISION_ 1718
+#define __WMI_REVISION_ 1719
 
 /** The Version Namespace should not be normally changed. Only
  *  host and firmware of the same WMI namespace will work