diff --git a/trunk/ripnews/set/intspan.rb b/trunk/ripnews/set/intspan.rb
index 3f45571..8ae6bd2 100644
--- a/trunk/ripnews/set/intspan.rb
+++ b/trunk/ripnews/set/intspan.rb
@@ -396,7 +396,7 @@ def diff (set_spec)
 			iB += 1
 			inA = ! inA
 			inB = ! inB
-			inA != inB and eS += xA
+			inA != inB and eS += [ xA ]
 		end
 	end