diff --git a/docs/en/modules/sntp.md b/docs/en/modules/sntp.md
index 9560d06a..987d7950 100644
--- a/docs/en/modules/sntp.md
+++ b/docs/en/modules/sntp.md
@@ -10,7 +10,9 @@ When compiled together with the [rtctime](rtctime.md) module it also offers seam
 
 ## sntp.sync()
 
-Attempts to obtain time synchronization.
+Attempts to obtain time synchronization. 
+
+For best results you may want to to call this periodically in order to compensate for internal clock drift. As stated in the [rtctime](rtctime.md) module documentation it's advisable to sync time after deep sleep and it's necessary to sync after module reset (add it to [`init.lua`](upload.md#initlua) after WiFi initialization).
 
 #### Syntax
 `sntp.sync([server_ip], [callback], [errcallback])`