diff --git a/dlls/crypt32/crypt32.spec b/dlls/crypt32/crypt32.spec
index 6b5d4939402..941359f63ff 100644
--- a/dlls/crypt32/crypt32.spec
+++ b/dlls/crypt32/crypt32.spec
@@ -148,6 +148,7 @@
 @ stub CryptSignHashU
 @ stub CryptSignMessage
 @ stub CryptSignMessageWithKey
+@ stub CryptUnprotectData
 @ stub CryptUnregisterDefaultOIDFunction
 @ stub CryptUnregisterOIDFunction
 @ stub CryptUnregisterOIDInfo