diff --git a/Examples/ruby/std_vector/runme.rb b/Examples/ruby/std_vector/runme.rb
index 1529d38c6..851190536 100644
--- a/Examples/ruby/std_vector/runme.rb
+++ b/Examples/ruby/std_vector/runme.rb
@@ -9,7 +9,7 @@ puts Example::average([1,2,3,4])
 # ... or a wrapped std::vector<int>
 
 v = Example::IntVector.new(4)
-0.upto(v.length-1) { |i| v[i] = i+1 }
+0.upto(v.size-1) { |i| v[i] = i+1 }
 puts Example::average(v)
 
 
@@ -17,7 +17,7 @@ puts Example::average(v)
 # Call it with a Ruby array...
 
 w = Example::half([1.0, 1.5, 2.0, 2.5, 3.0])
-0.upto(w.length-1) { |i| print w[i],"; " }
+0.upto(w.size-1) { |i| print w[i],"; " }
 puts
 
 # ... or a wrapped std::vector<double>
@@ -25,12 +25,12 @@ puts
 v = Example::DoubleVector.new
 [1,2,3,4].each { |i| v.push(i) }
 w = Example::half(v)
-0.upto(w.length-1) { |i| print w[i],"; " }
+0.upto(w.size-1) { |i| print w[i],"; " }
 puts
 
 # now halve a wrapped std::vector<double> in place
 
 Example::halve_in_place(v)
-0.upto(v.length-1) { |i| print v[i],"; " }
+0.upto(v.size-1) { |i| print v[i],"; " }
 puts