diff --git a/reactos/dll/win32/advapi32/reg/reg.c b/reactos/dll/win32/advapi32/reg/reg.c
index 312fb19226f..61ecd6b870a 100644
--- a/reactos/dll/win32/advapi32/reg/reg.c
+++ b/reactos/dll/win32/advapi32/reg/reg.c
@@ -4732,8 +4732,21 @@ RegSaveKeyExW(HKEY hKey,
               LPSECURITY_ATTRIBUTES lpSecurityAttributes,
               DWORD Flags)
 {
-    FIXME("RegSaveKeyExW() not implemented!\n");
-    return ERROR_INVALID_PARAMETER;
+    switch (Flags)
+    {
+        case REG_STANDARD_FORMAT:
+        case REG_LATEST_FORMAT:
+        case REG_NO_COMPRESSION:
+            break;
+        default:
+            return ERROR_INVALID_PARAMETER;
+    }
+
+    FIXME("RegSaveKeyExW(): Flags ignored!\n");
+
+    return RegSaveKeyW(hKey,
+                       lpFile,
+                       lpSecurityAttributes);
 }
 
 
diff --git a/reactos/include/psdk/winnt.h b/reactos/include/psdk/winnt.h
index 8cd50947e28..b37d6f53f2d 100644
--- a/reactos/include/psdk/winnt.h
+++ b/reactos/include/psdk/winnt.h
@@ -277,6 +277,10 @@ typedef DWORD FLONG;
 #define SPECIFIC_RIGHTS_ALL	0xFFFF
 #define ACCESS_SYSTEM_SECURITY	0x1000000
 
+#define REG_STANDARD_FORMAT 1
+#define REG_LATEST_FORMAT   2
+#define REG_NO_COMPRESSION  4
+
 #ifndef WIN32_NO_STATUS
 
 #define STATUS_WAIT_0                    ((DWORD)0x00000000)