diff --git a/model-command/src/main/java/lcsb/mapviewer/commands/layout/ApplySimpleLayoutModelCommand.java b/model-command/src/main/java/lcsb/mapviewer/commands/layout/ApplySimpleLayoutModelCommand.java
index bc58fcaeb33f20a6898eaf24274ec7524ad7e69b..bc5a62e40ec7db894c18582101675ea10d6f1137 100644
--- a/model-command/src/main/java/lcsb/mapviewer/commands/layout/ApplySimpleLayoutModelCommand.java
+++ b/model-command/src/main/java/lcsb/mapviewer/commands/layout/ApplySimpleLayoutModelCommand.java
@@ -272,7 +272,7 @@ public class ApplySimpleLayoutModelCommand extends ApplyLayoutModelCommand {
       }
       Point2D productPoint = reaction.getReactants().get(0).getElement().getCenter();
       Point2D operatorPoint = getMiddlePoint(middle, productPoint);
-      operator.setLine(new PolylineData(operatorPoint,middle));
+      operator.setLine(new PolylineData(operatorPoint, middle));
       reaction.addNode(operator);
       middle = operatorPoint;
     }
@@ -311,7 +311,7 @@ public class ApplySimpleLayoutModelCommand extends ApplyLayoutModelCommand {
       }
       Point2D productPoint = reaction.getProducts().get(0).getElement().getCenter();
       Point2D operatorPoint = getMiddlePoint(middle, productPoint);
-      operator.setLine(new PolylineData(middle, operatorPoint));
+      operator.setLine(new PolylineData(operatorPoint, middle));
       reaction.addNode(operator);
       middle = operatorPoint;
     }