diff --git a/mutants/mutant-1/swen90006/machine/Machine.java b/mutants/mutant-1/swen90006/machine/Machine.java
index 9bf57316d1c736ea2bd1c62bd6df3c6c0282f331..3f6ceb395a53e9b681061513d2ba5724de8a9b1e 100644
--- a/mutants/mutant-1/swen90006/machine/Machine.java
+++ b/mutants/mutant-1/swen90006/machine/Machine.java
@@ -39,7 +39,7 @@ public class Machine
   /** jz ra offs       =~   if (ra == 0) pc = pc + offs else pc = pc + 1 */
   public static final String INSTRUCTION_JZ = "jz";
     
-  public static final int NUM_REGS = 32;
+  public static final int NUM_REGS = 33;
   public static final int MAX_REG = (NUM_REGS - 1);
   public static final int MEMORY_SIZE = 65536; /* 4 x as much memory as a 64 */
   public static final int MAX_ADDR = MEMORY_SIZE-1;