diff --git a/util/libeay.num b/util/libeay.num
index bb3b9812d..25fe72711 100755
--- a/util/libeay.num
+++ b/util/libeay.num
@@ -3656,3 +3656,4 @@ ENGINE_set_load_ssl_client_cert_function 4044	EXIST::FUNCTION:ENGINE
 ENGINE_get_ssl_client_cert_function     4045	EXIST::FUNCTION:ENGINE
 ENGINE_load_ssl_client_cert             4046	EXIST::FUNCTION:ENGINE
 ENGINE_load_capi                        4047	EXIST::FUNCTION:CAPIENG,ENGINE
+OPENSSL_isservice                       4048	EXIST:WIN32:FUNCTION: