diff --git a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
index 6f9f0399db3fd..60a9eee7c7cb7 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb
@@ -31,7 +31,7 @@ def quote(value, column = nil)
           # BigDecimals need to be put in a non-normalized form and quoted.
         when nil        then "NULL"
         when BigDecimal then value.to_s('F')
-        when Numeric    then value.to_s
+        when Numeric, ActiveSupport::Duration then value.to_s
         when Date, Time then "'#{quoted_date(value)}'"
         when Symbol     then "'#{quote_string(value.to_s)}'"
         when Class      then "'#{value.to_s}'"
diff --git a/activerecord/test/cases/column_test.rb b/activerecord/test/cases/column_test.rb
index 4111a5f8084b6..a7b63d15c9127 100644
--- a/activerecord/test/cases/column_test.rb
+++ b/activerecord/test/cases/column_test.rb
@@ -76,6 +76,12 @@ def test_type_cast_date
         date_string = Time.now.utc.strftime("%F")
         assert_equal date_string, column.type_cast(date_string).strftime("%F")
       end
+
+      def test_type_cast_duration_to_integer
+        column = Column.new("field", nil, "integer")
+        assert_equal 1800, column.type_cast(30.minutes)
+        assert_equal 7200, column.type_cast(2.hours)
+      end
     end
   end
 end
diff --git a/activerecord/test/cases/quoting_test.rb b/activerecord/test/cases/quoting_test.rb
index 80ee74e41ec2a..3dd11ae89dd5c 100644
--- a/activerecord/test/cases/quoting_test.rb
+++ b/activerecord/test/cases/quoting_test.rb
@@ -216,6 +216,14 @@ def string_to_binary(value)
       def test_string_with_crazy_column
         assert_equal "'lo\\\\l'", @quoter.quote('lo\l', FakeColumn.new(:foo))
       end
+
+      def test_quote_duration
+        assert_equal "1800", @quoter.quote(30.minutes)
+      end
+
+      def test_quote_duration_int_column
+        assert_equal "7200", @quoter.quote(2.hours, FakeColumn.new(:integer))
+      end
     end
   end
 end