diff --git a/sdk/xtdk/xtfw.h b/sdk/xtdk/xtfw.h
index 5ad745d..a69ed77 100644
--- a/sdk/xtdk/xtfw.h
+++ b/sdk/xtdk/xtfw.h
@@ -127,7 +127,7 @@ typedef struct _KERNEL_INITIALIZATION_BLOCK
     ULONG BlockSize;
     ULONG BlockVersion;
     ULONG ProtocolVersion;
-    PCHAR KernelParameters;
+    PWCHAR KernelParameters;
     LIST_ENTRY LoadOrderListHead;
     LIST_ENTRY MemoryDescriptorListHead;
     LIST_ENTRY BootDriverListHead;