diff --git a/legacy/watch_faces/sensor/accelerometer_data_acquisition_face.c b/legacy/watch_faces/sensor/accelerometer_data_acquisition_face.c
index 968a7b81..cb49e018 100644
--- a/legacy/watch_faces/sensor/accelerometer_data_acquisition_face.c
+++ b/legacy/watch_faces/sensor/accelerometer_data_acquisition_face.c
@@ -448,13 +448,13 @@ static void start_reading(accelerometer_data_acquisition_state_t *state) {
 
     state->records[state->pos++] = record;
     lis2dw_fifo_t fifo;
-    lis2dw_read_fifo(&fifo, LIS2DW_FIFO_TIMEOUT_SECOND); // dump the fifo, this starts a fresh round of data in continue_reading
+    lis2dw_read_fifo(&fifo, LIS2DW_FIFO_TIMEOUT); // dump the fifo, this starts a fresh round of data in continue_reading
 }
 
 static void continue_reading(accelerometer_data_acquisition_state_t *state) {
     printf("Continue reading\n");
     lis2dw_fifo_t fifo;
-    lis2dw_read_fifo(&fifo, LIS2DW_FIFO_TIMEOUT_SECOND);
+    lis2dw_read_fifo(&fifo, LIS2DW_FIFO_TIMEOUT);
 
     fifo.count = min(fifo.count, 25); // hacky, but we need a consistent data rate; if we got a 26th data point, chuck it.
     uint8_t offset = 4 * (25 - fifo.count); // also hacky: we're sometimes short at the start. align to beginning of next second.
diff --git a/watch-faces/sensor/lis2dw_monitor_face.c b/watch-faces/sensor/lis2dw_monitor_face.c
index ade0df55..8afb7d3e 100644
--- a/watch-faces/sensor/lis2dw_monitor_face.c
+++ b/watch-faces/sensor/lis2dw_monitor_face.c
@@ -420,7 +420,7 @@ static void _monitor_update(lis2dw_monitor_state_t *state)
     lis2dw_fifo_t fifo;
     float x = 0, y = 0, z = 0;
 
-    lis2dw_read_fifo(&fifo, LIS2DW_FIFO_TIMEOUT_SECOND / DISPLAY_FREQUENCY);
+    lis2dw_read_fifo(&fifo, LIS2DW_FIFO_TIMEOUT / DISPLAY_FREQUENCY);
     if (fifo.count == 0) {
         return;
     }
diff --git a/watch-library/shared/driver/lis2dw.h b/watch-library/shared/driver/lis2dw.h
index f81c7750..fc5947e0 100644
--- a/watch-library/shared/driver/lis2dw.h
+++ b/watch-library/shared/driver/lis2dw.h
@@ -301,7 +301,7 @@ typedef enum {
 #define LIS2DW_CTRL7_VAL_HP_REF_MODE        0b00000010
 #define LIS2DW_CTRL7_VAL_LPASS_ON6D         0b00000001
 
-#define LIS2DW_FIFO_TIMEOUT_SECOND          100
+#define LIS2DW_FIFO_TIMEOUT                 100  // timeout is in terms of 1/RTC_CNT_HZ seconds (likely 128 timeouts is one second)
 
 bool lis2dw_begin(void);