diff --git a/reactos/include/ddk/zwtypes.h b/reactos/include/ddk/zwtypes.h
index 9bf911585dd..1095c91c948 100644
--- a/reactos/include/ddk/zwtypes.h
+++ b/reactos/include/ddk/zwtypes.h
@@ -995,7 +995,40 @@ struct _SYSTEM_SESSION_PROCESSES_INFORMATION
 
 // memory information
 
-#define MemoryBasicInformation			0
+typedef enum _MEMORY_INFORMATION_CLASS {
+ MemoryBasicInformation,
+ MemoryWorkingSetList,
+ MemorySectionName //,
+ //MemoryBasicVlmInformation //???
+} MEMORY_INFORMATION_CLASS;
+
+typedef struct _MEMORY_BASIC_INFORMATION { // Information Class 0
+ PVOID BaseAddress;
+ PVOID AllocationBase;
+ ULONG AllocationProtect;
+ ULONG RegionSize;
+ ULONG State;
+ ULONG Protect;
+ ULONG Type;
+} MEMORY_BASIC_INFORMATION, *PMEMORY_BASIC_INFORMATION;
+
+typedef struct _MEMORY_WORKING_SET_LIST { // Information Class 1
+ ULONG NumberOfPages;
+ ULONG WorkingSetList[1];
+} MEMORY_WORKING_SET_LIST, *PMEMORY_WORKING_SET_LIST;
+
+// Information Class 2
+#define _MEMORY_SECTION_NAME_STATIC(__bufsize__) \
+ { \
+ UNICODE_STRING SectionFileName; \
+ WCHAR          NameBuffer[(__bufsize__)]; \
+} 
+
+#define MEMORY_SECTION_NAME_STATIC(__bufsize__) \
+ struct _MEMORY_SECTION_NAME_STATIC((__bufsize__) 
+
+typedef struct _MEMORY_SECTION_NAME_STATIC(ANYSIZE_ARRAY)
+ MEMORY_SECTION_NAME, *PMEMORY_SECTION_NAME;
 
 // shutdown action
 
diff --git a/reactos/include/ntos/mm.h b/reactos/include/ntos/mm.h
index f0f04f52dcb..7ed75b4bc9f 100644
--- a/reactos/include/ntos/mm.h
+++ b/reactos/include/ntos/mm.h
@@ -54,16 +54,6 @@
 #define SECTION_QUERY		(0x1)
 #define SECTION_ALL_ACCESS	(0xf001fL)
 
-typedef struct _MEMORY_BASIC_INFORMATION {
-  PVOID BaseAddress;
-  PVOID AllocationBase;
-  DWORD AllocationProtect;
-  DWORD RegionSize;
-  DWORD State;
-  DWORD Protect;
-  DWORD Type;
-} MEMORY_BASIC_INFORMATION, *PMEMORY_BASIC_INFORMATION;
-
 #define FILE_MAP_ALL_ACCESS	(0xf001fL)
 #define FILE_MAP_READ	(4)
 #define FILE_MAP_WRITE	(2)