diff --git a/fw/wlan_defs.h b/fw/wlan_defs.h
index beeb87b17a75..9c878dc41fe3 100755
--- a/fw/wlan_defs.h
+++ b/fw/wlan_defs.h
@@ -172,11 +172,23 @@ typedef enum {
 #endif
 } WLAN_PHY_MODE;
 
-#ifndef CONFIG_160MHZ_SUPPORT
+#if (!defined(CONFIG_160MHZ_SUPPORT)) && (!defined(SUPPORT_11AX))
 A_COMPILE_TIME_ASSERT(
     mode_unknown_value_consistency_Check,
     MODE_UNKNOWN == MODE_UNKNOWN_NO_160MHZ_SUPPORT);
 #else
+/*
+ * If SUPPORT_11AX is defined but CONFIG_160MHZ_SUPPORT is not defined,
+ * there will be a gap in the mode values, with 14 and 15 being unused.
+ * But MODE_UNKNOWN_NO_160MHZ_SUPPORT will have an invalid value, since
+ * mode values 16 through 23 will be used for 11AX modes.
+ * Thus, MODE_UNKNOWN would still be MODE_UNKNOWN_160MHZ_SUPPORT, for
+ * cases where 160 MHz is not supported by 11AX is supported.
+ * (Ideally, MODE_UNKNOWN_160MHZ_SUPPORT and NO_160MHZ_SUPPORT should be
+ * renamed to cover the 4 permutations of support or no support for
+ * 11AX and 160 MHZ, but that is impractical, due to backwards
+ * compatibility concerns.)
+ */
 A_COMPILE_TIME_ASSERT(
     mode_unknown_value_consistency_Check,
     MODE_UNKNOWN == MODE_UNKNOWN_160MHZ_SUPPORT);