diff --git a/resize.py b/resize.py
index eff845b..1338aad 100755
--- a/resize.py
+++ b/resize.py
@@ -52,3 +52,4 @@ try:
     im.save(outfile, "JPEG", quality=100)
 except IOError:
     print("cannot create thumbnail for '%s'" % infile)
+    sys.exit(os.EX_DATAERR)