diff --git a/src/core/kernel/exports/EmuKrnl.cpp b/src/core/kernel/exports/EmuKrnl.cpp
index f7b0cb444..a53220c83 100644
--- a/src/core/kernel/exports/EmuKrnl.cpp
+++ b/src/core/kernel/exports/EmuKrnl.cpp
@@ -175,6 +175,7 @@ void CallSoftwareInterrupt(const xbox::KIRQL SoftwareIrql)
 	HalInterruptRequestRegister ^= (1 << SoftwareIrql);
 }
 
+// This masks have been verified to be correct against a kernel dump
 const DWORD IrqlMasks[] = {
 	0xFFFFFFFE, // IRQL 0
 	0xFFFFFFFC, // IRQL 1 (APC_LEVEL)
@@ -189,12 +190,12 @@ const DWORD IrqlMasks[] = {
 	0x000FFFF0, // IRQL 10
 	0x0007FFF0, // IRQL 11
 	0x0003FFF0, // IRQL 12
-	0x0001FFF0, // IRQL 13
-	0x0001FFF0, // IRQL 14
+	0x0001FFF0, // IRQL 13 (same as IRQL 14)
+	0x0001FFF0, // IRQL 14 (same as IRQL 13)
 	0x00017FF0, // IRQL 15
 	0x00013FF0, // IRQL 16
-	0x00011FF0, // IRQL 17
-	0x00011FF0, // IRQL 18
+	0x00011FF0, // IRQL 17 (same as IRQL 18)
+	0x00011FF0, // IRQL 18 (same as IRQL 17)
 	0x000117F0, // IRQL 19
 	0x000113F0, // IRQL 20
 	0x000111F0, // IRQL 21