diff --git a/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/lwipopts.h b/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/lwipopts.h
index 6a5b9a51a5..0d8ad55629 100644
--- a/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/lwipopts.h
+++ b/targets/CMSIS-OS/ChibiOS/ST_STM32F769I_DISCOVERY/lwipopts.h
@@ -81,6 +81,9 @@
 #define NO_SYS_NO_TIMERS                0
 #endif
 
+// empty on purpose
+#define LWIP_TCPIP_THREAD_ALIVE()
+
 /**
  * MEMCPY: override this if you have a faster implementation at hand than the
  * one included in your C library
@@ -705,6 +708,8 @@
 #define DHCP_DOES_ARP_CHECK             ((LWIP_DHCP) && (LWIP_ARP))
 #endif
 
+#define LWIP_DHCP_CHECK_LINK_UP         1
+
 /*
    ------------------------------------
    ---------- AUTOIP options ----------
@@ -1272,7 +1277,7 @@
  * sys_thread_new() when the thread is created.
  */
 #ifndef TCPIP_THREAD_PRIO
-#define TCPIP_THREAD_PRIO               (NORMALPRIO + 1)
+#define TCPIP_THREAD_PRIO               (NORMALPRIO)
 #endif
 
 /**
@@ -1306,7 +1311,7 @@
  * sys_thread_new() when the thread is created.
  */
 #ifndef SLIPIF_THREAD_PRIO
-#define SLIPIF_THREAD_PRIO              (NORMALPRIO + 1)
+#define SLIPIF_THREAD_PRIO              (NORMALPRIO)
 #endif
 
 /**
@@ -1331,7 +1336,7 @@
  * sys_thread_new() when the thread is created.
  */
 #ifndef PPP_THREAD_PRIO
-#define PPP_THREAD_PRIO                 (NORMALPRIO + 1)
+#define PPP_THREAD_PRIO                 (NORMALPRIO)
 #endif
 
 /**
@@ -1356,7 +1361,7 @@
  * sys_thread_new() when the thread is created.
  */
 #ifndef DEFAULT_THREAD_PRIO
-#define DEFAULT_THREAD_PRIO             (NORMALPRIO + 1)
+#define DEFAULT_THREAD_PRIO             (NORMALPRIO)
 #endif
 
 /**