diff --git a/Bulding-for-Windows-(MSYS).md b/Bulding-for-Windows-(MSYS).md
index 498fa06..fb25917 100644
--- a/Bulding-for-Windows-(MSYS).md
+++ b/Bulding-for-Windows-(MSYS).md
@@ -3,18 +3,26 @@ Get install file `msys2-$ARCH-*.exe` from `https://msys2.github.io`
 Where $ARCH is `i686` or `x86_64` (matching your system).
 
 - Open MSYS2 Shell (from Start menu).
-- Install all prerequisites:
+- Install prerequisites and set PATH:
 
         export ARCH='i686'     # or 'x86_64'
         export MINGW='mingw32' # or 'mingw64'
-        pacman -S mingw-w64-$ARCH-boost mingw-w64-$ARCH-openssl mingw-w64-$ARCH-gcc git make
+        pacman -S mingw-w64-$ARCH-boost mingw-w64-$ARCH-openssl mingw-w64-$ARCH-gcc git make    
+        export PATH=/$MINGW/bin:/usr/bin  
+
+- Build db-4.8
+        Download http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz
+        Unpack it
+        Edit cd db-4.8.30.NC/dist/config.sub : find string "-mingw32* |" and replace by "-mingw32* | -msys* |"  
+        cd db-4.8.30.NC/build_unix  
+        ../dist/configure --enable-mingw --enable-cxx --disable-shared --disable-replication --prefix=/usr/local  
+        make  
+        make install  
 
 - Build gostcoin
         mkdir -p /c/dev/gostcoin  
         cd /c/dev/gostcoin  
         git clone https://github.com/GOSTSec/gostcoin.git  
-        # we need compiler on PATH which is usually heavily cluttered on Windows  
-        export PATH=/$MINGW/bin:/usr/bin  
         cd gostcoin/i2psam  
         make -f makefile.mingw  
         cd ../src