diff --git a/ethereumj-core/src/main/java/org/ethereum/vm/VM.java b/ethereumj-core/src/main/java/org/ethereum/vm/VM.java
index a0c77460..5cc94b36 100644
--- a/ethereumj-core/src/main/java/org/ethereum/vm/VM.java
+++ b/ethereumj-core/src/main/java/org/ethereum/vm/VM.java
@@ -734,7 +734,8 @@ public class VM {
                 	program.stackRequire(n);
                 	DataWord word_1 = stack.peek();
         			stack.set(stack.size() - 1, stack.get(stack.size() - n));
-        			stack.set(stack.size() - n, word_1);         	
+        			stack.set(stack.size() - n, word_1);
+        			program.step();
 
                 }	break;
                 case MLOAD:{