diff --git a/dlls/crypt32/cert.c b/dlls/crypt32/cert.c
index 2ab147a6992..0dc10c0e651 100644
--- a/dlls/crypt32/cert.c
+++ b/dlls/crypt32/cert.c
@@ -1530,6 +1530,15 @@ BOOL WINAPI CryptHashPublicKeyInfo(HCRYPTPROV_LEGACY hCryptProv, ALG_ID Algid,
     return ret;
 }
 
+BOOL WINAPI CryptHashToBeSigned(HCRYPTPROV_LEGACY hCryptProv,
+ DWORD dwCertEncodingType, const BYTE *pbEncoded, DWORD cbEncoded,
+ BYTE *pbComputedHash, DWORD *pcbComputedHash)
+{
+    FIXME("(%08lx, %08x, %p, %d, %p, %d): stub\n", hCryptProv, dwCertEncodingType,
+     pbEncoded, cbEncoded, pbComputedHash, *pcbComputedHash);
+    return FALSE;
+}
+
 BOOL WINAPI CryptSignCertificate(HCRYPTPROV_OR_NCRYPT_KEY_HANDLE hCryptProv,
  DWORD dwKeySpec, DWORD dwCertEncodingType, const BYTE *pbEncodedToBeSigned,
  DWORD cbEncodedToBeSigned, PCRYPT_ALGORITHM_IDENTIFIER pSignatureAlgorithm,
diff --git a/dlls/crypt32/crypt32.spec b/dlls/crypt32/crypt32.spec
index 6db95ab716b..fab52a0a0bf 100644
--- a/dlls/crypt32/crypt32.spec
+++ b/dlls/crypt32/crypt32.spec
@@ -131,7 +131,7 @@
 @ stdcall CryptHashCertificate(long long long ptr long ptr ptr)
 @ stdcall CryptHashMessage(ptr long long ptr ptr ptr ptr ptr ptr)
 @ stdcall CryptHashPublicKeyInfo(long long long long ptr ptr ptr)
-@ stub CryptHashToBeSigned
+@ stdcall CryptHashToBeSigned(ptr long ptr long ptr ptr)
 @ stub CryptImportPKCS8
 @ stdcall CryptImportPublicKeyInfo(long long ptr ptr)
 @ stdcall CryptImportPublicKeyInfoEx(long long ptr long long ptr ptr)