diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c

index 7be4fb4..ab3865a 100644

--- a/src/event/ngx_event_openssl.c

+++ b/src/event/ngx_event_openssl.c

@@ -727,16 +727,24 @@ ngx_ssl_load_certificate_key(ngx_pool_t *pool, char **err,

             return NULL;

         }

+        if (!ENGINE_init(engine)) {

+            *err = "ENGINE_init() failed";

+            ENGINE_free(engine);

+            return NULL;

+        }

+

         *last++ = ':';

         pkey = ENGINE_load_private_key(engine, (char *) last, 0, 0);

         if (pkey == NULL) {

             *err = "ENGINE_load_private_key() failed";

+            ENGINE_finish(engine);

             ENGINE_free(engine);

             return NULL;

         }

+        ENGINE_finish(engine);

         ENGINE_free(engine);

         return pkey;