diff --git a/fw/wmi_unified.h b/fw/wmi_unified.h
index f91ca63aec..a55e813a9a 100644
--- a/fw/wmi_unified.h
+++ b/fw/wmi_unified.h
@@ -9021,6 +9021,13 @@ typedef enum {
     /** Update dot11ObssNbruToleranceTime in fw. Param value: seconds */
     WMI_VDEV_PARAM_UPDATE_OBSS_RU_TOLERANCE_TIME,         /* 0x90 */
 
+    /** Parameter used when MTU size is sent by the host
+     * In particular, this configuration message is used for cases where the
+     * encapsulation header results in a larger max frame size than the
+     * typical 802.3 + SNAP/LLC frame.
+     */
+    WMI_VDEV_PARAM_MAX_MTU_SIZE,                          /* 0x91 */
+
 
     /*=== ADD NEW VDEV PARAM TYPES ABOVE THIS LINE ===
      * The below vdev param types are used for prototyping, and are
diff --git a/fw/wmi_version.h b/fw/wmi_version.h
index b250417efb..ab6f39e5d2 100644
--- a/fw/wmi_version.h
+++ b/fw/wmi_version.h
@@ -36,7 +36,7 @@
 #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_ 590
+#define __WMI_REVISION_ 591
 
 /** The Version Namespace should not be normally changed. Only
  *  host and firmware of the same WMI namespace will work