diff --git a/sdk/include/psdk/wininet.h b/sdk/include/psdk/wininet.h
index c29646c7cd2..cfc2b2675b0 100644
--- a/sdk/include/psdk/wininet.h
+++ b/sdk/include/psdk/wininet.h
@@ -2042,6 +2042,7 @@ PrivacyGetZonePreferenceW(
 #define ERROR_INTERNET_SEC_CERT_ERRORS          (INTERNET_ERROR_BASE + 55)
 #define ERROR_INTERNET_SEC_CERT_NO_REV          (INTERNET_ERROR_BASE + 56)
 #define ERROR_INTERNET_SEC_CERT_REV_FAILED      (INTERNET_ERROR_BASE + 57)
+#define ERROR_INTERNET_SEC_CERT_WEAK_SIGNATURE  (INTERNET_ERROR_BASE + 62)
 #define ERROR_FTP_TRANSFER_IN_PROGRESS          (INTERNET_ERROR_BASE + 110)
 #define ERROR_FTP_DROPPED                       (INTERNET_ERROR_BASE + 111)
 #define ERROR_FTP_NO_PASSIVE_MODE               (INTERNET_ERROR_BASE + 112)