diff --git a/bin/mpw b/bin/mpw
index 3eb9fd9..8ee1305 100755
--- a/bin/mpw
+++ b/bin/mpw
@@ -16,7 +16,7 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
-$: << File.expand_path('../../lib', __FILE__)
+$LOAD_PATH << File.expand_path('../../lib', __FILE__)
 
 require 'locale'
 require 'set'