diff --git a/sdk/xtdk/amd64/ketypes.h b/sdk/xtdk/amd64/ketypes.h
index 7ef61ff..745b1b8 100644
--- a/sdk/xtdk/amd64/ketypes.h
+++ b/sdk/xtdk/amd64/ketypes.h
@@ -139,6 +139,9 @@
 /* XTOS Kernel stack size */
 #define KERNEL_STACK_SIZE                 0x8000
 
+/* XTOS Kernel stack guard pages */
+#define KERNEL_STACK_GUARD_PAGES          1
+
 /* Kernel frames */
 #define KEXCEPTION_FRAME_SIZE             sizeof(KEXCEPTION_FRAME)
 #define KSWITCH_FRAME_SIZE                sizeof(KSWITCH_FRAME)
diff --git a/sdk/xtdk/i686/ketypes.h b/sdk/xtdk/i686/ketypes.h
index 1c3fc27..d8c2d6c 100644
--- a/sdk/xtdk/i686/ketypes.h
+++ b/sdk/xtdk/i686/ketypes.h
@@ -165,6 +165,9 @@
 /* XTOS Kernel stack size */
 #define KERNEL_STACK_SIZE                 0x4000
 
+/* XTOS Kernel stack guard pages */
+#define KERNEL_STACK_GUARD_PAGES          1
+
 /* Kernel frames */
 #define KTRAP_FRAME_ALIGN                 0x08
 #define KTRAP_FRAME_SIZE                  sizeof(KTRAP_FRAME)