diff --git a/Documentation/pycardium/utime.rst b/Documentation/pycardium/utime.rst
index ebcff6ccbc518d593431797fb5d66c580e8201e3..a2900145d06d197b9492c57d3269fd7b152cb5b1 100644
--- a/Documentation/pycardium/utime.rst
+++ b/Documentation/pycardium/utime.rst
@@ -28,6 +28,11 @@ alarm.
    Return the current timestamp in seconds since 2000-01-01 00:00 in
    the local timezone.
 
+.. py:function:: time_ms()
+
+   Return the current timestamp in milliseconds since 2000-01-01 00:00 in
+   the local timezone.
+
 .. py:function:: set_time(secs)
 
    Sets the time to ``secs`` seconds since 2000-01-01 00:00 in the local
diff --git a/epicardium/epicardium.h b/epicardium/epicardium.h
index 68c3ce29f920a530c1f6cc2839413e9a45ca93c4..e8176d815768a5f06b3bf32472a034a54f91a201 100644
--- a/epicardium/epicardium.h
+++ b/epicardium/epicardium.h
@@ -1567,7 +1567,7 @@ API(API_FILE_MKDIR, int epic_file_mkdir(const char *dirname));
 API(API_RTC_GET_SECONDS, uint32_t epic_rtc_get_seconds(void));
 
 /**
- * Read the current RTC value.
+ * Read the current RTC value in ms.
  *
  * :return: Unix time in milliseconds
  */