diff --git a/kaminari-core/lib/kaminari/helpers/paginator.rb b/kaminari-core/lib/kaminari/helpers/paginator.rb
index a349c93..4c8a71e 100644
--- a/kaminari-core/lib/kaminari/helpers/paginator.rb
+++ b/kaminari-core/lib/kaminari/helpers/paginator.rb
@@ -145,8 +145,8 @@ module Kaminari
         end
 
         def single_gap?
-          (@page == @options[:current_page] - @options[:window] - 1) && (@page == @options[:left] + 1) ||
-            (@page == @options[:current_page] + @options[:window] + 1) && (@page == @options[:total_pages] - @options[:right])
+          ((@page == @options[:current_page] - @options[:window] - 1) && (@page == @options[:left] + 1)) ||
+            ((@page == @options[:current_page] + @options[:window] + 1) && (@page == @options[:total_pages] - @options[:right]))
         end
 
         def out_of_range?