diff --git a/misc/config_tools/schema/checks/vuart_config.xsd b/misc/config_tools/schema/checks/vuart_config.xsd
index ae8e08bc4..25e59f947 100644
--- a/misc/config_tools/schema/checks/vuart_config.xsd
+++ b/misc/config_tools/schema/checks/vuart_config.xsd
@@ -43,4 +43,10 @@
     </xs:annotation>
   </xs:assert>
 
+  <xs:assert test="not (//BUILD_TYPE = 'debug' and //SERIAL_CONSOLE = 'None')">
+    <xs:annotation acrn:severity="error" acrn:report-on="//BUILD_TYPE">
+      <xs:documentation>You can't use debug Build type when there is no serial console config</xs:documentation>
+    </xs:annotation>
+  </xs:assert>
+
 </xs:schema>
diff --git a/misc/config_tools/static_allocators/s5_vuart.py b/misc/config_tools/static_allocators/s5_vuart.py
index 3328b69a3..7602818f2 100644
--- a/misc/config_tools/static_allocators/s5_vuart.py
+++ b/misc/config_tools/static_allocators/s5_vuart.py
@@ -43,6 +43,8 @@ def get_console_vuart_port(scenario_etree, vm_name):
         port = "0x3E8U"
     elif port == "COM Port 4":
         port = "0x2E8U"
+    else:
+        port = "0x0U"
 
     return port