diff --git a/platform/mbed_board.c b/platform/mbed_board.c
index d882f6ec1c..4b3844e2a4 100644
--- a/platform/mbed_board.c
+++ b/platform/mbed_board.c
@@ -33,16 +33,16 @@ WEAK MBED_NORETURN void mbed_die(void)
     while (1) {
         for (int i = 0; i < 4; ++i) {
             gpio_write(&led_err, 1);
-            wait_ms(150);
+            wait_us(150000);
             gpio_write(&led_err, 0);
-            wait_ms(150);
+            wait_us(150000);
         }
 
         for (int i = 0; i < 4; ++i) {
             gpio_write(&led_err, 1);
-            wait_ms(400);
+            wait_us(400000);
             gpio_write(&led_err, 0);
-            wait_ms(400);
+            wait_us(400000);
         }
     }
 }