diff --git a/activesupport/lib/active_support/core_ext/string/output_safety.rb b/activesupport/lib/active_support/core_ext/string/output_safety.rb
index a19b5c95c7eba6b251007671fc2d51b3139d6176..172b7258ef6129989e3984c2b58c194f2ecbec7e 100644
--- a/activesupport/lib/active_support/core_ext/string/output_safety.rb
+++ b/activesupport/lib/active_support/core_ext/string/output_safety.rb
@@ -67,7 +67,7 @@ def html_safe?
   end
 end
 
-class Fixnum
+class Numeric
   def html_safe?
     true
   end
diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb
index 7a8cda160dd1078bdeb62894860e12d9b76a8b55..0360cf2901b1854051d330963f0ed7f6a3af9f2a 100644
--- a/activesupport/test/core_ext/string_ext_test.rb
+++ b/activesupport/test/core_ext/string_ext_test.rb
@@ -353,6 +353,10 @@ def to_s
   test "A fixnum is safe by default" do
     assert 5.html_safe?
   end
+  
+  test "a float is safe by default" do
+    assert 5.7.html_safe?
+  end
 
   test "An object is unsafe by default" do
     assert !@object.html_safe?