diff --git a/boards/frdm-kw41z/include/periph_conf.h b/boards/frdm-kw41z/include/periph_conf.h
index 05feabb1cd..93ed4e7102 100644
--- a/boards/frdm-kw41z/include/periph_conf.h
+++ b/boards/frdm-kw41z/include/periph_conf.h
@@ -88,6 +88,8 @@ static const clock_config_t clock_config = {
         { \
             .dev = LPTMR0, \
             .irqn = LPTMR0_IRQn, \
+            .src = 2, \
+            .base_freq = 32768u, \
         } \
     }
 #define TIMER_NUMOF             ((PIT_NUMOF) + (LPTMR_NUMOF))