diff --git a/tools/easy.py b/tools/easy.py
index 9cf4362b..01cae5a6 100755
--- a/tools/easy.py
+++ b/tools/easy.py
@@ -49,7 +49,7 @@
 print('Scaling training data...')
 Popen(cmd, shell = True, stdout = PIPE).communicate()	
 
-cmd = '{0} -svmtrain "{1}" -gnuplot "{2}" "{3}"'.format(grid_py, svmtrain_exe, gnuplot_exe, scaled_file)
+cmd = 'python {0} -svmtrain "{1}" -gnuplot "{2}" "{3}"'.format(grid_py, svmtrain_exe, gnuplot_exe, scaled_file)
 print('Cross validation...')
 f = Popen(cmd, shell = True, stdout = PIPE).stdout