diff --git a/src/sillymachine.adb b/src/sillymachine.adb
index 30fc977..c49b106 100644
--- a/src/sillymachine.adb
+++ b/src/sillymachine.adb
@@ -2,6 +2,7 @@ with Ada.Text_IO; use Ada.Text_IO;
 with Ada.Sequential_IO;
 with Ada.Command_Line; use Ada.Command_Line;
 with Ada.Directories;
+with Interfaces; use Interfaces;
 
 procedure sillymachine is
   type Byte is mod 256;
@@ -102,10 +103,10 @@ begin
         Instruction (i) := MemoryArr (PC + i);
       end loop;
 
-      case Instruction (0) is -- execute the instruction
+      case Shift_Left(Unsigned_128(Instruction (0)), 8) + Unsigned_128(Instruction (1)) is -- execute the instruction
         when 0 => Put_Line("-- japko --");
         when 1 => Put_Line("-- banan --");
-        when 255 => goto THE_END;
+        when 65535 => goto THE_END; -- exit opcode
         when others => New_Line(1);
       end case;