diff --git a/dlls/wintrust/softpub.c b/dlls/wintrust/softpub.c
index 7f5f86f5a5a..1db4b47107f 100644
--- a/dlls/wintrust/softpub.c
+++ b/dlls/wintrust/softpub.c
@@ -54,6 +54,24 @@ HRESULT WINAPI SoftpubInitialize(CRYPT_PROVIDER_DATA *data)
     return ret;
 }
 
+HRESULT WINAPI DriverInitializePolicy(CRYPT_PROVIDER_DATA *data)
+{
+    FIXME("stub\n");
+    return S_OK;
+}
+
+HRESULT WINAPI DriverCleanupPolicy(CRYPT_PROVIDER_DATA *data)
+{
+    FIXME("stub\n");
+    return S_OK;
+}
+
+HRESULT WINAPI DriverFinalPolicy(CRYPT_PROVIDER_DATA *data)
+{
+    FIXME("stub\n");
+    return S_OK;
+}
+
 /* Assumes data->pWintrustData->u.pFile exists.  Makes sure a file handle is
  * open for the file.
  */
diff --git a/dlls/wintrust/wintrust.spec b/dlls/wintrust/wintrust.spec
index 64c51e20375..0627711f5fb 100644
--- a/dlls/wintrust/wintrust.spec
+++ b/dlls/wintrust/wintrust.spec
@@ -42,9 +42,9 @@
 @ stdcall CryptSIPVerifyIndirectData(ptr ptr)
 @ stdcall -private DllRegisterServer()
 @ stdcall -private DllUnregisterServer()
-@ stub DriverCleanupPolicy
-@ stub DriverFinalPolicy
-@ stub DriverInitializePolicy
+@ stdcall DriverCleanupPolicy(ptr)
+@ stdcall DriverFinalPolicy(ptr)
+@ stdcall DriverInitializePolicy(ptr)
 @ stub FindCertsByIssuer
 @ stdcall GenericChainCertificateTrust(ptr)
 @ stdcall GenericChainFinalProv(ptr)