diff --git a/paw/stos/head/ke/knot.h b/paw/stos/head/ke/knot.h
index 91502d3..b9ee362 100644
--- a/paw/stos/head/ke/knot.h
+++ b/paw/stos/head/ke/knot.h
@@ -21,6 +21,7 @@
  * @KNOT_EXCEPTION:         Fatal exception
  * @IRQL_NOT_LTE:           IRQL not less than or equal
  * @IRQL_NOT_GTE:           IRQL not greater than or equal
+ * @KNOT_BAD_CHECKSUM:      Fatal bad checksum value
  */
 typedef enum {
     KNOT_MISC,
@@ -29,7 +30,8 @@ typedef enum {
     KNOT_OOM,
     KNOT_EXCEPTION,
     IRQL_NOT_LTE,
-    IRQL_NOT_GTE
+    IRQL_NOT_GTE,
+    KNOT_BAD_CHECKSUM
 } KNOT_REASON;
 
 /*
diff --git a/paw/stos/ke/knot.c b/paw/stos/ke/knot.c
index ea5831d..52a8d08 100644
--- a/paw/stos/ke/knot.c
+++ b/paw/stos/ke/knot.c
@@ -24,7 +24,8 @@ static const CHAR *ReasonTable[] = {
     [KNOT_OOM] = "out of memory",
     [KNOT_EXCEPTION] = "fatal exception",
     [IRQL_NOT_LTE] = "irql not less than or equal",
-    [IRQL_NOT_GTE] = "irql not greater than or equal"
+    [IRQL_NOT_GTE] = "irql not greater than or equal",
+    [KNOT_BAD_CHECKSUM] = "bad checksum"
 };
 
 /* Globals */