diff --git a/PowerFGT/Public/cmdb/wireless/ssid-policy.ps1 b/PowerFGT/Public/cmdb/wireless/ssid-policy.ps1
index c574428e..da68348a 100644
--- a/PowerFGT/Public/cmdb/wireless/ssid-policy.ps1
+++ b/PowerFGT/Public/cmdb/wireless/ssid-policy.ps1
@@ -87,6 +87,11 @@ function Get-FGTWirelessSSIDPolicy {
             default { }
         }
 
+        #before 7.0.x, it is not available
+        if ($connection.version -lt "7.0.0") {
+            Throw "Wireless SSID Policy is not available before Forti OS 7.9"
+        }
+
         #if filter value and filter_attribute, add filter (by default filter_type is equal)
         if ( $filter_value -and $filter_attribute ) {
             $invokeParams.add( 'filter_value', $filter_value )
diff --git a/Tests/integration/Connection.Tests.ps1 b/Tests/integration/Connection.Tests.ps1
index 9a3148a5..038444ce 100644
--- a/Tests/integration/Connection.Tests.ps1
+++ b/Tests/integration/Connection.Tests.ps1
@@ -368,9 +368,12 @@ Describe "Connect to a FortiGate (using multi connection)" {
         It "Use Multi connection for call Get Wireless Setting" {
             { Get-FGTWirelessSetting -connection $fgt } | Should -Not -Throw
         }
-        It "Use Multi connection for call Get Wireless SSID Policy" {
+        It "Use Multi connection for call Get Wireless SSID Policy (> 7.0.0)" -skip:($fgt_version -lt "7.0.0") {
             { Get-FGTWirelessSSIDPolicy -connection $fgt } | Should -Not -Throw
         }
+        It "Use Multi connection for call Get  Wireless SSID Policy (< 7.0.0)" -skip:($fgt_version -ge "7.0.0") {
+            { Get-FGTWirelessSSIDPolicy -connection $fgt } | Should -Throw "Wireless SSID Policy is not available before Forti OS 6.4"
+        }
         It "Use Multi connection for call Get Wireless VAP (Virtual AP Profile)" {
             { Get-FGTWirelessVAP -connection $fgt } | Should -Not -Throw
         }