diff --git a/dlls/advapi32/advapi32.spec b/dlls/advapi32/advapi32.spec
index 4189458a7eb..cb4dd4d857a 100644
--- a/dlls/advapi32/advapi32.spec
+++ b/dlls/advapi32/advapi32.spec
@@ -87,7 +87,7 @@
 @ stdcall ConvertStringSecurityDescriptorToSecurityDescriptorW(wstr long ptr ptr)
 @ stdcall ConvertStringSidToSidA(ptr ptr)
 @ stdcall ConvertStringSidToSidW(ptr ptr)
-# @ stub ConvertToAutoInheritPrivateObjectSecurity
+@ stdcall ConvertToAutoInheritPrivateObjectSecurity(ptr ptr ptr ptr long ptr)
 @ stdcall CopySid(long ptr ptr)
 # @ stub CreateCodeAuthzLevel
 @ stdcall CreatePrivateObjectSecurity(ptr ptr ptr long long ptr)
diff --git a/dlls/advapi32/security.c b/dlls/advapi32/security.c
index 6a19ef01612..ef9ce6ea353 100644
--- a/dlls/advapi32/security.c
+++ b/dlls/advapi32/security.c
@@ -4553,6 +4553,19 @@ BOOL WINAPI ConvertSidToStringSidA(PSID pSid, LPSTR *pstr)
     return TRUE;
 }
 
+BOOL WINAPI ConvertToAutoInheritPrivateObjectSecurity(
+        PSECURITY_DESCRIPTOR pdesc,
+        PSECURITY_DESCRIPTOR cdesc,
+        PSECURITY_DESCRIPTOR* ndesc,
+        GUID* objtype,
+        BOOL isdir,
+        PGENERIC_MAPPING genmap )
+{
+    FIXME("%p %p %p %p %d %p - stub\n", pdesc, cdesc, ndesc, objtype, isdir, genmap);
+
+    return FALSE;
+}
+
 BOOL WINAPI CreatePrivateObjectSecurity(
         PSECURITY_DESCRIPTOR ParentDescriptor,
         PSECURITY_DESCRIPTOR CreatorDescriptor,
diff --git a/include/winbase.h b/include/winbase.h
index cf0345baa0a..f7ccb8c7639 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1338,6 +1338,7 @@ WINBASEAPI INT         WINAPI CompareFileTime(const FILETIME*,const FILETIME*);
 WINBASEAPI BOOL        WINAPI ConvertFiberToThread(void);
 WINBASEAPI LPVOID      WINAPI ConvertThreadToFiber(LPVOID);
 WINBASEAPI LPVOID      WINAPI ConvertThreadToFiberEx(LPVOID,DWORD);
+WINADVAPI  BOOL        WINAPI ConvertToAutoInheritPrivateObjectSecurity(PSECURITY_DESCRIPTOR,PSECURITY_DESCRIPTOR,PSECURITY_DESCRIPTOR*,GUID*,BOOL,PGENERIC_MAPPING);
 WINBASEAPI HANDLE      WINAPI CreateActCtxA(PCACTCTXA);
 WINBASEAPI HANDLE      WINAPI CreateActCtxW(PCACTCTXW);
 #define                       CreateActCtx WINELIB_NAME_AW(CreateActCtx)