diff --git a/ports/esp32s2/common-hal/pulseio/PulseOut.c b/ports/esp32s2/common-hal/pulseio/PulseOut.c
index a07ec39dc2..d3c163ca8b 100644
--- a/ports/esp32s2/common-hal/pulseio/PulseOut.c
+++ b/ports/esp32s2/common-hal/pulseio/PulseOut.c
@@ -86,6 +86,6 @@ void common_hal_pulseio_pulseout_send(pulseio_pulseout_obj_t* self, uint16_t* pu
 
     rmt_write_items(self->channel, items, length, true);
     while (rmt_wait_tx_done(self->channel, 0) != ESP_OK) {
-        RUN_BACKGROUND_TASKS();
+        RUN_BACKGROUND_TASKS;
     }
 }