diff --git a/lib/progress_bar/components/progressable.rb b/lib/progress_bar/components/progressable.rb
index 794bf0c0..3d5d40d0 100644
--- a/lib/progress_bar/components/progressable.rb
+++ b/lib/progress_bar/components/progressable.rb
@@ -66,7 +66,7 @@ def percentage_completed
         # Doing this way so we can avoid converting each
         # number to a float and then back to an integer.
         #
-        self.progress * 100 / total
+        (self.progress * 100 / total).to_i
       end
 
       def percentage_completed_with_precision
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 28218c0f..75dd0616 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,5 +1,7 @@
 require 'simplecov'
-SimpleCov.start
+SimpleCov.start if RUBY_VERSION != "1.9.3" # simplecov + ruby 1.9.3 ends up with segmentation fault
+
+require 'mathn'
 
 require 'rspec'