diff --git a/appveyor.yml b/appveyor.yml
index 07c4fac28..5eaa77b2f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -131,7 +131,7 @@ install:
 - if "%OSVARIANT%"=="" bash -c "which csc.exe"
 - if "%OSVARIANT%"=="" bash -c "csc.exe /? | head -n 1"
 - if "%OSVARIANT%"=="cygwin" %CYGWINSETUP% --quiet-mode --packages python2-devel,libpcre-devel,libboost-devel > cygwin-install.txt || bash -c "cat cygwin-install.txt"
-- if "%OSVARIANT%"=="mingw" bash -c "pacman --noconfirm --sync mingw%MBITS%/mingw-w64-%MARCH%-pcre mingw%MBITS%/mingw-w64-%MARCH%-boost"
+- if "%OSVARIANT%"=="mingw" bash -c "pacman --noconfirm --sync mingw%MBITS%/mingw-w64-%MARCH%-autotools mingw%MBITS%/mingw-w64-%MARCH%-pcre mingw%MBITS%/mingw-w64-%MARCH%-boost"
 - if not "%WITHLANG%"=="" set SWIGWITHLANG==%WITHLANG%
 - if not "%WITHLANG%"=="" where %WITHLANG%
 - bash -c "which $CC"