diff --git a/ruby/lib/google/protobuf/well_known_types.rb b/ruby/lib/google/protobuf/well_known_types.rb
index 2ee65bc267..37f8d5b675 100644
--- a/ruby/lib/google/protobuf/well_known_types.rb
+++ b/ruby/lib/google/protobuf/well_known_types.rb
@@ -72,8 +72,14 @@ module Google
     end
 
     Timestamp.class_eval do
-      def to_time
-        Time.at(self.to_f)
+      if RUBY_VERSION < "2.5"
+        def to_time
+          Time.at(self.to_f)
+        end
+      else
+        def to_time
+          Time.at(seconds, nanos, :nanosecond)
+        end
       end
 
       def from_time(time)