diff --git a/lib/risc/padding.rb b/lib/risc/padding.rb
index e839c43a..37205b34 100644
--- a/lib/risc/padding.rb
+++ b/lib/risc/padding.rb
@@ -6,7 +6,7 @@ module Padding
   # objects only come in lengths of multiple of 8 words / 32 bytes
   # and there is a "hidden" 1 word that is used for debug/check memory corruption
   def self.padded( len )
-    a = 32 * (1 + (len + 3)/32 )
+    a = 32 * (1 + ((len + 3)/32).floor )
     #puts "#{a} for #{len}"
     a
   end