diff --git a/bufferevent-internal.h b/bufferevent-internal.h
index 0404d4ff..3ad0acf0 100644
--- a/bufferevent-internal.h
+++ b/bufferevent-internal.h
@@ -306,20 +306,20 @@ extern const struct bufferevent_ops bufferevent_ops_pair;
 #define BEV_IS_FILTER(bevp) ((bevp)->be_ops == &bufferevent_ops_filter)
 #define BEV_IS_PAIR(bevp) ((bevp)->be_ops == &bufferevent_ops_pair)
 
-#if defined(EVENT__HAVE_OPENSSL) | defined(EVENT__HAVE_MBEDTLS)
-extern const struct bufferevent_ops bufferevent_ops_ssl;
-#define BEV_IS_SSL(bevp) ((bevp)->be_ops == &bufferevent_ops_ssl)
+#if defined(EVENT__HAVE_OPENSSL) || defined(EVENT__HAVE_MBEDTLS)
+/* We cannot use the same trick with external declaration,
+ * since there are copy of bufferevent_ops_ssl in each library:
+ * - openssl
+ * - mbedlts
+ *
+ * However we can just compare the name of the bufferevent type for now.
+ * (It is totally fine to use memcmp() here since it will be optimized by the compiler).
+ */
+#define BEV_IS_SSL(bevp) (!memcmp((bevp)->be_ops->type, "ssl", 3))
 #else
 #define BEV_IS_SSL(bevp) 0
 #endif
 
-#if defined(EVENT__HAVE_MBEDTLS)
-extern const struct bufferevent_ops bufferevent_ops_mbedtls;
-#define BEV_IS_MBEDTLS(bevp) ((bevp)->be_ops == &bufferevent_ops_mbedtls)
-#else
-#define BEV_IS_MBEDTLS(bevp) 0
-#endif
-
 #ifdef _WIN32
 extern const struct bufferevent_ops bufferevent_ops_async;
 #define BEV_IS_ASYNC(bevp) ((bevp)->be_ops == &bufferevent_ops_async)