diff --git a/epicardium/epicardium.h b/epicardium/epicardium.h
index 485cb2e1b19bc47af0ee31192cd43cb9470d2fb8..00562f1c6c0db9bcc65652a10928a2642f4c0ba2 100644
--- a/epicardium/epicardium.h
+++ b/epicardium/epicardium.h
@@ -101,8 +101,11 @@ API(API_UART_WRITE, void epic_uart_write_str(const char *str, intptr_t length));
 
 /**
  * Blocking read a single character from any connected serial device.
- * ``epic_uart_read_chr`` only returns
- * once one byte has been read.
+ * ``epic_uart_read_chr`` only returns once one byte has been read.
+ *
+ * .. todo::
+ *
+ *    This API function is currently in violation of the API rules.
  *
  * :return:  The byte.
  */