diff --git a/kaminari-core/lib/kaminari/models/page_scope_methods.rb b/kaminari-core/lib/kaminari/models/page_scope_methods.rb
index cffb29d..89a71bc 100644
--- a/kaminari-core/lib/kaminari/models/page_scope_methods.rb
+++ b/kaminari-core/lib/kaminari/models/page_scope_methods.rb
@@ -25,7 +25,9 @@ module Kaminari
     end
 
     def padding(num)
-      @_padding = num.to_i
+      num = num.to_i
+      raise ArgumentError, "padding must not be negative" if num < 0
+      @_padding = num
       offset(offset_value + @_padding)
     end
 
diff --git a/kaminari-core/test/models/active_record/scopes_test.rb b/kaminari-core/test/models/active_record/scopes_test.rb
index 2d53b77..1c1f3f9 100644
--- a/kaminari-core/test/models/active_record/scopes_test.rb
+++ b/kaminari-core/test/models/active_record/scopes_test.rb
@@ -203,6 +203,10 @@ if defined? ActiveRecord
             assert_equal 19, relation.current_page
             assert_equal 19, relation.total_pages
           end
+
+          test 'Negative padding' do
+            assert_raise(ArgumentError) { model_class.page(1).per(5).padding(-1) }
+          end
         end
 
         sub_test_case '#total_pages' do
diff --git a/kaminari-core/test/models/array_test.rb b/kaminari-core/test/models/array_test.rb
index cc03f68..b363df4 100644
--- a/kaminari-core/test/models/array_test.rb
+++ b/kaminari-core/test/models/array_test.rb
@@ -88,6 +88,10 @@ class PaginatableArrayTest < ActiveSupport::TestCase
     test 'per 25, padding 25' do
       assert_equal 3, @array.page(1).padding(25).total_pages
     end
+
+    test 'Negative padding' do
+      assert_raise(ArgumentError) { @array.page(1).per(5).padding(-1) }
+    end
   end
 
   sub_test_case '#total_pages' do