diff --git a/mutants/mutant-1/swen90006/machine/Machine.java b/mutants/mutant-1/swen90006/machine/Machine.java
index 9bf57316d1c736ea2bd1c62bd6df3c6c0282f331..8c6541551cee8ca45b07fdbbd90dde62ce19a37c 100644
--- a/mutants/mutant-1/swen90006/machine/Machine.java
+++ b/mutants/mutant-1/swen90006/machine/Machine.java
@@ -287,7 +287,7 @@ public class Machine
 	throw new InvalidInstructionException();
       }
       count++;
-      pc = pc + 1;
+      pc = pc - 1;
     }
 
     /* got here without returning already... */