diff --git a/lib/configure.py b/lib/configure.py
index 59f89f67db..0210b916fb 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -1048,7 +1048,7 @@ def checkConverterEntries():
     #
     checkProg('Gnuplot', ['gnuplot'], 
         rc_entry = [ r'''\Format gnuplot     "gp, gnuplot"    "Gnuplot"     "" "" ""  "vector"	"text/plain"
-\converter gnuplot      pdf6      "python -tt $$s/scripts/gnuplot2pdf.py $$i $$o"    ""''' ])
+\converter gnuplot      pdf6      "python -tt $$s/scripts/gnuplot2pdf.py $$i $$o"    "needauth"''' ])
     #
     # gnumeric/xls/ods to tex
     checkProg('a spreadsheet -> latex converter', ['ssconvert'],