diff --git a/lib/register/instruction.rb b/lib/register/instruction.rb
index e1ca77a6..6bfdbc1a 100644
--- a/lib/register/instruction.rb
+++ b/lib/register/instruction.rb
@@ -26,6 +26,11 @@ module Register
       raise "abstract called for #{self.class}"
     end
 
+    # wrap symbols into regsiter reference if needed
+    def wrap_register reg
+      return reg if reg.is_a? RegisterReference
+      RegisterReference.new(reg)
+    end
   end
   
 end
diff --git a/lib/register/instructions/register_transfer.rb b/lib/register/instructions/register_transfer.rb
index e55386d2..44d4f59b 100644
--- a/lib/register/instructions/register_transfer.rb
+++ b/lib/register/instructions/register_transfer.rb
@@ -4,8 +4,8 @@ module Register
 
   class RegisterTransfer < Instruction
     def initialize from , to
-      @from = from
-      @to = to
+      @from = wrap_register(from)
+      @to = wrap_register(to)
     end
     attr_reader :from, :to
   end