From 2e1be3282586d23df146a7f76c33a6ea6953047e Mon Sep 17 00:00:00 2001
From: Ivan Grokhotkov <igrokhotkov@gmail.com>
Date: Thu, 4 Feb 2016 01:24:38 +0300
Subject: [PATCH] Fix undefined reference to os_free (#1522)

---
 cores/esp8266/uart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cores/esp8266/uart.c b/cores/esp8266/uart.c
index f2db9ae42..9294e9170 100644
--- a/cores/esp8266/uart.c
+++ b/cores/esp8266/uart.c
@@ -230,7 +230,7 @@ void uart_uninit(uart_t* uart)
         break;
     }
 
-    os_free(uart);
+    free(uart);
 }
 
 void uart_swap(uart_t* uart, int tx_pin)