diff --git a/pms5003.c b/pms5003.c
index 6886339..1ec09e7 100644
--- a/pms5003.c
+++ b/pms5003.c
@@ -133,5 +133,6 @@ pms5003_reading pms5003_finish_reading(pms5003_config *config) {
   gpio_put(config->enable_pin, 0);
   pms5003_reading average_reading = compute_avarage_reading();
   reading_i = 0;
+  rx_i = 0;
   return average_reading;
 }