diff --git a/app/server/ruby/core.rb b/app/server/ruby/core.rb
index fb1e4d2bf0..226ae765d8 100755
--- a/app/server/ruby/core.rb
+++ b/app/server/ruby/core.rb
@@ -831,7 +831,7 @@ def repeat(n=2)
 
       def take_last(n=1)
         self if n >= size
-        self[(size-n)..-1]
+        self[(size-n)..size-1]
       end
 
       def butlast