diff --git a/libraries/mbed/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/us_ticker.c b/libraries/mbed/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/us_ticker.c
index 1ac290aaba..4834db308d 100644
--- a/libraries/mbed/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/us_ticker.c
+++ b/libraries/mbed/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/us_ticker.c
@@ -18,6 +18,7 @@
 #include "cmsis.h"
 #include "PeripheralNames.h"
 #include "app_timer.h"
+#include "projectconfig.h"
 
 static bool           us_ticker_inited          = false;
 static volatile bool  us_ticker_appTimerRunning = false;
@@ -29,7 +30,7 @@ void us_ticker_init(void)
         return;
     }
 
-    APP_TIMER_INIT(0 /*CFG_TIMER_PRESCALER*/ , 1 /*CFG_TIMER_MAX_INSTANCE*/, 1 /*CFG_TIMER_OPERATION_QUEUE_SIZE*/, false /*CFG_SCHEDULER_ENABLE*/);
+    APP_TIMER_INIT(CFG_TIMER_PRESCALER, CFG_TIMER_MAX_INSTANCE, CFG_TIMER_OPERATION_QUEUE_SIZE, CFG_SCHEDULER_ENABLE);
 
     us_ticker_inited = true;
 }