diff --git a/src/SSLSocket.c b/src/SSLSocket.c
index ade31e11..ac046a6d 100644
--- a/src/SSLSocket.c
+++ b/src/SSLSocket.c
@@ -593,7 +593,9 @@ int SSLSocket_createContext(networkHandles* net, MQTTClient_SSLOptions* opts)
 		}
 	}
 
+#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
 	SSL_CTX_set_security_level(net->ctx, 1);
+#endif
 
 	if (opts->keyStore)
 	{