diff --git a/include/tlhelp32.h b/include/tlhelp32.h
index d3a73685a2c..b43840ffe33 100644
--- a/include/tlhelp32.h
+++ b/include/tlhelp32.h
@@ -154,6 +154,9 @@ typedef struct tagHEAPLIST32
     DWORD dwFlags;
 } HEAPLIST32, *PHEAPLIST32, *LPHEAPLIST32;
 
+#define HF32_DEFAULT 1
+#define HF32_SHARED  2
+
 BOOL WINAPI Heap32ListFirst(HANDLE,LPHEAPLIST32);
 BOOL WINAPI Heap32ListNext(HANDLE,LPHEAPLIST32);
 BOOL WINAPI Toolhelp32ReadProcessMemory(DWORD,LPCVOID,LPVOID,SIZE_T,SIZE_T*);