diff --git a/components/spi_flash/include/esp_partition.h b/components/spi_flash/include/esp_partition.h
index 36baea2986..550bf6b6b2 100644
--- a/components/spi_flash/include/esp_partition.h
+++ b/components/spi_flash/include/esp_partition.h
@@ -181,7 +181,9 @@ esp_partition_iterator_t esp_partition_next(esp_partition_iterator_t iterator);
 /**
  * @brief Release partition iterator
  *
- * @param iterator Iterator obtained using esp_partition_find. Must be non-NULL.
+ * @param iterator Iterator obtained using esp_partition_find.
+ *                 The iterator is allowed to be NULL, so it is not necessary to check its value
+ *                 before calling this function.
  *
  */
 void esp_partition_iterator_release(esp_partition_iterator_t iterator);