--- a/tools/build/src/engine/build.sh	2015-07-07 09:46:25.813659600 +0300
+++ b/tools/build/src/engine/build.sh	2015-07-07 09:47:50.111229000 +0300
@@ -58,11 +58,24 @@
         test `uname` = $*
     fi
 }
+
+test_msystem ()
+{
+    if [ -n $MSYSTEM ]; then
+      test "$MSYSTEM" = "$*"
+    fi
+}
 
 # Try and guess the toolset to bootstrap the build with...
 Guess_Toolset ()
 {
     if test_uname Darwin ; then BOOST_JAM_TOOLSET=darwin
+    elif test_msystem MINGW32 ; then
+        BOOST_JAM_TOOLSET=gcc
+        BOOST_JAM_TOOLSET_ROOT=/mingw32/
+    elif test_msystem MINGW64 ; then
+        BOOST_JAM_TOOLSET=gcc
+        BOOST_JAM_TOOLSET_ROOT=/mingw64/
     elif test_uname IRIX ; then BOOST_JAM_TOOLSET=mipspro
     elif test_uname IRIX64 ; then BOOST_JAM_TOOLSET=mipspro
     elif test_uname OSF1 ; then BOOST_JAM_TOOLSET=tru64cxx