diff --git a/reactos/drivers/input/sermouse/sermouse.c b/reactos/drivers/input/sermouse/sermouse.c
index f1b64e189d5..b67fa14b8d2 100644
--- a/reactos/drivers/input/sermouse/sermouse.c
+++ b/reactos/drivers/input/sermouse/sermouse.c
@@ -11,12 +11,6 @@
 #include <ddk/ntddk.h>
 #include <ddk/ntddmou.h>
 
-/*
- * HAL:KdComPortInUse used to prevent detecting mouse on port
- * that is occupied by kernel debugger.
- */
-ULONG DECLSPEC_IMPORT KdComPortInUse;
-
 /*
  * Compile time options
  */
@@ -26,7 +20,7 @@ ULONG DECLSPEC_IMPORT KdComPortInUse;
 /* Check for mouse on COM1? */
 #define SERMOUSE_COM1_SUPPORT
 /* Check for mouse on COM2? */
-#define SERMOUSE_COM2_SUPPORT
+/* #define SERMOUSE_COM2_SUPPORT */
 /* Create \??\Mouse* symlink for device? */
 #define SERMOUSE_MOUSESYMLINK_SUPPORT
 
@@ -574,10 +568,6 @@ InitializeMouse(ULONG Port, ULONG Irq, PDRIVER_OBJECT DriverObject)
 	KAFFINITY Affinity;
 	ULONG MouseType;
 
-	/* Don't detect mouse on port that is occupied by kernel debugger */
-	if (KdComPortInUse == Port)
-		return FALSE;
-
 	/* Try to detect mouse on specified port */
 	MouseType = DetectMicrosoftMouse(Port);