diff --git a/sdk/xtdk/amd64/mmtypes.h b/sdk/xtdk/amd64/mmtypes.h
index e1c15e4..9dcf761 100644
--- a/sdk/xtdk/amd64/mmtypes.h
+++ b/sdk/xtdk/amd64/mmtypes.h
@@ -17,6 +17,14 @@
 #define MM_PAGE_SHIFT                              12
 #define MM_PAGE_SIZE                               4096
 
+/* Page size enumeration list */
+typedef enum _PAGE_SIZE
+{
+    Size4K,
+    Size2M,
+    Size1G
+} PAGE_SIZE, *PPAGE_SIZE;
+
 /* Page Table entry structure definition */
 typedef struct _HARDWARE_PTE
 {
diff --git a/sdk/xtdk/amd64/xtstruct.h b/sdk/xtdk/amd64/xtstruct.h
index f22ad5a..ee7ea93 100644
--- a/sdk/xtdk/amd64/xtstruct.h
+++ b/sdk/xtdk/amd64/xtstruct.h
@@ -16,6 +16,7 @@
 typedef enum _CPU_VENDOR CPU_VENDOR, *PCPU_VENDOR;
 typedef enum _CPUID_FEATURES CPUID_FEATURES, *PCPUID_FEATURES;
 typedef enum _CPUID_REQUESTS CPUID_REQUESTS, *PCPUID_REQUESTS;
+typedef enum _PAGE_SIZE PAGE_SIZE, *PPAGE_SIZE;
 
 /* Architecture-specific structures forward references */
 typedef struct _CONTEXT CONTEXT, *PCONTEXT;
diff --git a/sdk/xtdk/i686/mmtypes.h b/sdk/xtdk/i686/mmtypes.h
index cb9db8f..719e9af 100644
--- a/sdk/xtdk/i686/mmtypes.h
+++ b/sdk/xtdk/i686/mmtypes.h
@@ -17,6 +17,14 @@
 #define MM_PAGE_SHIFT                              12
 #define MM_PAGE_SIZE                               4096
 
+/* Page size enumeration list */
+typedef enum _PAGE_SIZE
+{
+    Size4K,
+    Size2M,
+    Size1G
+} PAGE_SIZE, *PPAGE_SIZE;
+
 /* Page Table entry structure definition (with PAE support) */
 typedef struct _HARDWARE_PTE
 {
diff --git a/sdk/xtdk/i686/xtstruct.h b/sdk/xtdk/i686/xtstruct.h
index 59aca37..57cb712 100644
--- a/sdk/xtdk/i686/xtstruct.h
+++ b/sdk/xtdk/i686/xtstruct.h
@@ -16,6 +16,7 @@
 typedef enum _CPU_VENDOR CPU_VENDOR, *PCPU_VENDOR;
 typedef enum _CPUID_FEATURES CPUID_FEATURES, *PCPUID_FEATURES;
 typedef enum _CPUID_REQUESTS CPUID_REQUESTS, *PCPUID_REQUESTS;
+typedef enum _PAGE_SIZE PAGE_SIZE, *PPAGE_SIZE;
 
 /* Architecture-specific structures forward references */
 typedef struct _CONTEXT CONTEXT, *PCONTEXT;