diff --git a/bitbake/lib/bb/pysh/pyshyacc.py b/bitbake/lib/bb/pysh/pyshyacc.py
index de565dc9af..924860a6f3 100644
--- a/bitbake/lib/bb/pysh/pyshyacc.py
+++ b/bitbake/lib/bb/pysh/pyshyacc.py
@@ -570,6 +570,7 @@ def p_linebreak(p):
 
 def p_separator_op(p):                 
     """separator_op : COMMA
+                    | COMMA COMMA
                     | AMP"""
     p[0] = p[1]