diff --git a/lib/scripts/convertDefault.py b/lib/scripts/convertDefault.py
index 33da99b178..fa922c4713 100644
--- a/lib/scripts/convertDefault.py
+++ b/lib/scripts/convertDefault.py
@@ -18,7 +18,7 @@
 
 # converts an image from $1 to $2 format
 import os, sys
-if os.system(r'convert -depth 8 "%s" "%s"' % (sys.argv[1], sys.argv[2])) != 0:
+if os.system(r'convert -define pdf:use-cropbox=true -depth 8 "%s" "%s"' % (sys.argv[1], sys.argv[2])) != 0:
     print >> sys.stderr, sys.argv[0], 'ERROR'
     print >> sys.stderr, 'Execution of "convert" failed.'
     sys.exit(1)