1 files changed, 8 insertions, 3 deletions
diff --git a/activemodel/lib/active_model/validations/numericality.rb b/activemodel/lib/active_model/validations/numericality.rb
index 716010e88b..ac8308b0d7 100644
--- a/activemodel/lib/active_model/validations/numericality.rb
+++ b/activemodel/lib/active_model/validations/numericality.rb
@@ -57,10 +57,15 @@ module ActiveModel
     protected
 
       def parse_raw_value_as_a_number(raw_value)
-        begin
-          Kernel.Float(raw_value)
-        rescue ArgumentError, TypeError
+        case raw_value
+        when /\A0x/
           nil
+        else
+          begin
+            Kernel.Float(raw_value)
+          rescue ArgumentError, TypeError
+            nil
+          end
         end
       end