diff --git a/dlls/authz/authz.c b/dlls/authz/authz.c
index 6e98aac16cf..2c1f3d1cf2c 100644
--- a/dlls/authz/authz.c
+++ b/dlls/authz/authz.c
@@ -42,3 +42,17 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 
     return TRUE;
 }
+
+/***********************************************************************
+ *              AuthzInitializeResourceManager (AUTHZ.@)
+ */
+BOOL WINAPI AuthzInitializeResourceManager(DWORD flags, LPVOID pfnAccessChecker,
+    LPVOID pfnComputeDynGroups, LPVOID pfnFreeDynGroups,
+    LPCWSTR managerName, LPVOID lpManagerHandle )
+{
+    FIXME("(0x%X,%p,%p,%p,%s,%p): stub\n", flags, pfnAccessChecker,
+        pfnComputeDynGroups, pfnFreeDynGroups,
+        debugstr_w(managerName), lpManagerHandle);
+    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
+    return FALSE;
+}
diff --git a/dlls/authz/authz.spec b/dlls/authz/authz.spec
index bc3010e8042..8ffd52b64c5 100644
--- a/dlls/authz/authz.spec
+++ b/dlls/authz/authz.spec
@@ -13,7 +13,7 @@
 @ stub AuthzInitializeContextFromToken
 @ stub AuthzInitializeObjectAccessAuditEvent
 @ stub AuthzInitializeObjectAccessAuditEvent2
-@ stub AuthzInitializeResourceManager
+@ stdcall AuthzInitializeResourceManager(long ptr ptr ptr wstr ptr)
 @ stub AuthzInstallSecurityEventSource
 @ stub AuthzOpenObjectAudit
 @ stub AuthzRegisterSecurityEventSource