diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -62,3 +62,7 @@
 ## 0.4.0.5 -- 2019-12-06
 
 * Fourth version revised E. Improved the documentation.
+
+## 0.4.0.6 -- 2019-12-06
+
+* Fourth version revised F. Fixed an issue with the documentation for Main.main function.
diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -29,11 +29,15 @@
 -- | The function creates a raw PCM sound file with bitrate 22050 Hz 1 mono channel 16-bit signed-integer encoding 
 -- and tries to automatically convert it to the .wav file with the same parameters using the system binary SoX. 
 -- If it is not installed properly, the program makes ending informational message for the user. 
+-- 
 -- Command line argument is described in more details in the documentation for the 'Melodics.Ukrainian.nSymbols' function. 
+-- 
+-- ** Notification.
+-- 
 -- Please, notice that successful usage of the SoX installed in the system prior to the @mmsyn6ukr@ leads to approximately doubling 
 -- the size of used space in the storage for the resulting files because it adds a header to the .raw file and writes down additionally 
 -- the raw data to form a .wav file. Also notice that the size of the largest data file representing a symbol or their combination is 6792 bytes (with 44-byte 
--- header included). So, if you expect to create sounding for n symbols of the Ukrainian text, provide at least 2 * (6792 - 44) * n + 44 = 13496 * n - 44 (bytes) 
+-- header included). So, if you expect to create sounding for n symbols of the Ukrainian text, provide at least 2 * (6792 - 44) * n + 44 = 13496 * n + 44 (bytes) 
 -- of the additional space in the storage (in reality it can occupy much less because other data files are less in size).
 main :: IO ()
 main = do
diff --git a/mmsyn6ukr.cabal b/mmsyn6ukr.cabal
--- a/mmsyn6ukr.cabal
+++ b/mmsyn6ukr.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                mmsyn6ukr
-version:             0.4.0.5
+version:             0.4.0.6
 synopsis:            A musical instrument synthesizer or a tool for Ukrainian language listening
 description:         A program can be used as a musical instrument synthesizer or for Ukrainian speech synthesis especially for poets and writers
 homepage:            https://hackage.haskell.org/package/mmsyn6ukr