diff --git a/dlls/wintrust/wintrust.spec b/dlls/wintrust/wintrust.spec
index 53a246882cd..b0332cf3dd1 100644
--- a/dlls/wintrust/wintrust.spec
+++ b/dlls/wintrust/wintrust.spec
@@ -45,7 +45,7 @@
 @ stdcall DriverCleanupPolicy(ptr)
 @ stdcall DriverFinalPolicy(ptr)
 @ stdcall DriverInitializePolicy(ptr)
-@ stub FindCertsByIssuer
+@ stdcall FindCertsByIssuer(ptr ptr ptr ptr long wstr long)
 @ stdcall GenericChainCertificateTrust(ptr)
 @ stdcall GenericChainFinalProv(ptr)
 @ stdcall HTTPSCertificateTrust(ptr)
diff --git a/dlls/wintrust/wintrust_main.c b/dlls/wintrust/wintrust_main.c
index 302b2bd4283..9b8dd85c737 100644
--- a/dlls/wintrust/wintrust_main.c
+++ b/dlls/wintrust/wintrust_main.c
@@ -1216,3 +1216,16 @@ BOOL WINAPI IsCatalogFile(HANDLE hFile, WCHAR *pwszFileName)
         return FALSE;
     return IsEqualGUID(&guid, &catGUID);
 }
+
+/***********************************************************************
+ *              FindCertsByIssuer
+ */
+HRESULT WINAPI FindCertsByIssuer(PCERT_CHAIN pCertChains, DWORD *pcbCertChains,
+ DWORD *pcCertChains, BYTE* pbEncodedIssuerName, DWORD cbEncodedIssuerName,
+ LPCWSTR pwszPurpose, DWORD dwKeySpec)
+{
+    FIXME("(%p, %p, %p, %p, %d, %s, %d): stub\n", pCertChains, pcbCertChains,
+     pcCertChains, pbEncodedIssuerName, cbEncodedIssuerName,
+     debugstr_w(pwszPurpose), dwKeySpec);
+    return E_FAIL;
+}