diff --git a/lib/curl_sspi.h b/lib/curl_sspi.h
index 5af7c2483a..b26c391569 100644
--- a/lib/curl_sspi.h
+++ b/lib/curl_sspi.h
@@ -88,6 +88,22 @@ extern PSecurityFunctionTable s_pSecFn;
 # define CRYPT_E_REVOKED                      ((HRESULT)0x80092010L)
 #endif
 
+#ifndef CRYPT_E_NO_REVOCATION_DLL
+# define CRYPT_E_NO_REVOCATION_DLL            ((HRESULT)0x80092011L)
+#endif
+
+#ifndef CRYPT_E_NO_REVOCATION_CHECK
+# define CRYPT_E_NO_REVOCATION_CHECK          ((HRESULT)0x80092012L)
+#endif
+
+#ifndef CRYPT_E_REVOCATION_OFFLINE
+# define CRYPT_E_REVOCATION_OFFLINE           ((HRESULT)0x80092013L)
+#endif
+
+#ifndef CRYPT_E_NOT_IN_REVOCATION_DATABASE
+# define CRYPT_E_NOT_IN_REVOCATION_DATABASE   ((HRESULT)0x80092014L)
+#endif
+
 #ifdef UNICODE
 #  define SECFLAG_WINNT_AUTH_IDENTITY \
      (unsigned long)SEC_WINNT_AUTH_IDENTITY_UNICODE
diff --git a/lib/strerror.c b/lib/strerror.c
index be41914140..df6280bdd0 100644
--- a/lib/strerror.c
+++ b/lib/strerror.c
@@ -986,6 +986,10 @@ const char *Curl_sspi_strerror(int err, char *buf, size_t buflen)
       break;
 #define SEC2TXT(sec) case sec: txt = #sec; break
     SEC2TXT(CRYPT_E_REVOKED);
+    SEC2TXT(CRYPT_E_NO_REVOCATION_DLL);
+    SEC2TXT(CRYPT_E_NO_REVOCATION_CHECK);
+    SEC2TXT(CRYPT_E_REVOCATION_OFFLINE);
+    SEC2TXT(CRYPT_E_NOT_IN_REVOCATION_DATABASE);
     SEC2TXT(SEC_E_ALGORITHM_MISMATCH);
     SEC2TXT(SEC_E_BAD_BINDINGS);
     SEC2TXT(SEC_E_BAD_PKGID);