diff --git a/eo/src/gp/eoParseTree.h b/eo/src/gp/eoParseTree.h
index c5492225..b55d015b 100644
--- a/eo/src/gp/eoParseTree.h
+++ b/eo/src/gp/eoParseTree.h
@@ -175,13 +175,13 @@ public:
 	  int i = rng.random(_eo1.size());
 	  int j = rng.random(_eo2.size());
 
-	  parse_tree<Node>::subtree tmp = _eo1[j];
+	  parse_tree<Node>::subtree tmp = _eo1[i];
 	  _eo1[i] = _eo2[j]; // insert subtree
-	  _eo2[j]=tmp;
+	  _eo2[j] = tmp;
 
 	  _eo1.pruneTree(max_length);
 	  _eo2.pruneTree(max_length);
-
+	  
     return true;
   }