diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -132,3 +132,7 @@
 
 * Ninth version. Changed the behaviour in case of giving information to the user. Changed killing the main thread to raising a special
 exception with 'catchEnd' function. The program now becomes also a dependency for mmsyn7h package.
+
+## 0.9.1.0 -- 2020-01-24
+
+* Ninth version revised A. Fixed an issue with being not compiled because of not being imported module dependency.
diff --git a/Processing_mmsyn7ukr.hs b/Processing_mmsyn7ukr.hs
--- a/Processing_mmsyn7ukr.hs
+++ b/Processing_mmsyn7ukr.hs
@@ -43,6 +43,7 @@
 import System.Process
 import System.IO
 import System.Info (os)
+import System.Environment (getProgName)
 import SoXBasics
 import CaseBi (getBFst')
 import ReplaceP (replaceP, replaceP4)
diff --git a/mmsyn7ukr.cabal b/mmsyn7ukr.cabal
--- a/mmsyn7ukr.cabal
+++ b/mmsyn7ukr.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                mmsyn7ukr
-version:             0.9.0.0
+version:             0.9.1.0
 synopsis:            A simple basic interface to some SoX functionality or to produce a voice that can be used by mmsyn7h
 description:         A program and a library that can be used as a simple basic interface to some SoX functionality or to produce your voice in Ukrainian (if you pronounce the sounds properly) represented by the separate sounds or something special like soft sign.
 homepage:            https://hackage.haskell.org/package/mmsyn7ukr