diff --git a/sdk/xtdk/amd64/mmtypes.h b/sdk/xtdk/amd64/mmtypes.h
index f532337..00b44c4 100644
--- a/sdk/xtdk/amd64/mmtypes.h
+++ b/sdk/xtdk/amd64/mmtypes.h
@@ -101,6 +101,9 @@
 /* HAL memory pool virtual address start */
 #define MM_HARDWARE_VA_START                       0xFFFFFFFFFFC00000ULL
 
+/* Kernel shared data address */
+#define MM_KERNEL_SHARED_DATA_ADDRESS              0xFFFFFFFFFFDF0000ULL
+
 /* Maximum physical address used by HAL allocations */
 #define MM_MAXIMUM_PHYSICAL_ADDRESS                0x00000000FFFFFFFFULL
 
diff --git a/sdk/xtdk/i686/mmtypes.h b/sdk/xtdk/i686/mmtypes.h
index 2f40abb..8f3bd1c 100644
--- a/sdk/xtdk/i686/mmtypes.h
+++ b/sdk/xtdk/i686/mmtypes.h
@@ -99,6 +99,9 @@
 /* HAL memory pool virtual address start */
 #define MM_HARDWARE_VA_START                       0xFFC00000
 
+/* Kernel shared data address */
+#define MM_KERNEL_SHARED_DATA_ADDRESS              0xFFDF0000
+
 /* Maximum physical address used by HAL allocations */
 #define MM_MAXIMUM_PHYSICAL_ADDRESS                0xFFFFFFFF