diff --git a/readme.md b/readme.md
index c4e19ecc2..e6fdaede5 100644
--- a/readme.md
+++ b/readme.md
@@ -102,6 +102,8 @@ additional build requirements:
 setup:
 
     $ sudo apt install build-essential cmake git pkg-config mingw-w64 nsis cpack automake libtool
+    $ sudo update-alternatives --set x86_64-w64-mingw32-gcc /usr/bin/x86_64-w64-mingw32-gcc-posix
+    $ sudo update-alternatives --set x86_64-w64-mingw32-g++ /usr/bin/x86_64-w64-mingw32-g++-posix
 
 building: