diff --git a/src/unlocker/ssl.cpp b/src/unlocker/ssl.cpp
index 3e9b4e1..5be3634 100644
--- a/src/unlocker/ssl.cpp
+++ b/src/unlocker/ssl.cpp
@@ -102,7 +102,7 @@ void CertManager::installCert(X509* cert)
     PCCERT_CONTEXT certCtx = CertCreateCertificateContext(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, derBuf, derLen);
     if (certCtx)
     {
-        HCERTSTORE rootStore = CertOpenStore(CERT_STORE_PROV_SYSTEM, 0, NULL, CERT_SYSTEM_STORE_CURRENT_USER, L"Root");
+        HCERTSTORE rootStore = CertOpenStore(CERT_STORE_PROV_SYSTEM, 0, 0, CERT_SYSTEM_STORE_CURRENT_USER, L"Root");
         if (rootStore)
         {
             BOOL success = CertAddCertificateContextToStore(rootStore, certCtx, CERT_STORE_ADD_REPLACE_EXISTING, NULL);