diff --git a/ILD/doc/latex/documentEnvelopes.py b/ILD/doc/latex/documentEnvelopes.py
index 22847c50f..1774787c9 100644
--- a/ILD/doc/latex/documentEnvelopes.py
+++ b/ILD/doc/latex/documentEnvelopes.py
@@ -388,7 +388,7 @@ def lineStr( tl, opt="" ):
     i=0
     for t in tl:
         if( i>0 ):
-            print(' -- ',, file=o)
+            print(' -- ', file=o)
         print('(', t[0] ,',', t[1],') ', file=o)
         i += 1
     print(';', file=o)