diff --git a/source/Cosmos.Debug.DebugStub/Serial.asm b/source/Cosmos.Debug.DebugStub/Serial.asm
index 9d770be0d..d773d5c4f 100644
--- a/source/Cosmos.Debug.DebugStub/Serial.asm
+++ b/source/Cosmos.Debug.DebugStub/Serial.asm
@@ -1,4 +1,4 @@
-; Generated at 7-3-2015 19:22:31
+; Generated at 22-5-2015 19:17:06
 
 
 
@@ -11,6 +11,8 @@
 
 
 
+%ifndef Exclude_IOPort_Based_SerialInit
+
 DebugStub_InitSerial:
 Mov DX, 1
 Mov AL, 0
@@ -78,3 +80,5 @@ DebugStub_ComWrite8_Exit:
 mov dword [static_field__Cosmos_Core_INTs_mLastKnownAddress], DebugStub_ComWrite8_Exit
 Ret
 
+%endif
+
diff --git a/source/Cosmos.Debug.DebugStub/Serial.xs b/source/Cosmos.Debug.DebugStub/Serial.xs
index 1f1ce64b1..ebd8ff82b 100644
--- a/source/Cosmos.Debug.DebugStub/Serial.xs
+++ b/source/Cosmos.Debug.DebugStub/Serial.xs
@@ -38,6 +38,8 @@
 //
 // http://www.nondot.org/sabre/os/files/Communication/ser_port.txt
 
+! %ifndef Exclude_IOPort_Based_SerialInit
+
 // Todo Auto params
 // Todo ebp frame ptr auto etc
 function InitSerial {
@@ -135,3 +137,5 @@ Wait:
 
 	ESI++
 }
+
+! %endif