diff --git a/src/api/tcpip.c b/src/api/tcpip.c
index 939402f7..60a96fa1 100644
--- a/src/api/tcpip.c
+++ b/src/api/tcpip.c
@@ -152,7 +152,7 @@ dhcp_timer_coarse(void *arg)
   LWIP_UNUSED_ARG(arg);
   LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dhcp_coarse_tmr()\n"));
   dhcp_coarse_tmr();
-  sys_timeout(DHCP_COARSE_TIMER_SECS*1000, dhcp_timer_coarse, NULL);
+  sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
 }
 
 /**
@@ -225,7 +225,7 @@ tcpip_thread(void *arg)
   sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
 #endif /* LWIP_ARP */
 #if LWIP_DHCP
-  sys_timeout(DHCP_COARSE_TIMER_SECS*1000, dhcp_timer_coarse, NULL);
+  sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
   sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
 #endif /* LWIP_DHCP */
 #if LWIP_AUTOIP
diff --git a/src/include/lwip/dhcp.h b/src/include/lwip/dhcp.h
index 6f9f208c..400f81fd 100644
--- a/src/include/lwip/dhcp.h
+++ b/src/include/lwip/dhcp.h
@@ -17,6 +17,8 @@ extern "C" {
 
 /** period (in seconds) of the application calling dhcp_coarse_tmr() */
 #define DHCP_COARSE_TIMER_SECS 60 
+/** period (in milliseconds) of the application calling dhcp_coarse_tmr() */
+#define DHCP_COARSE_TIMER_MSECS (DHCP_COARSE_TIMER_SECS*1000)
 /** period (in milliseconds) of the application calling dhcp_fine_tmr() */
 #define DHCP_FINE_TIMER_MSECS 500