diff -r 19f19c66b67e -r 63f4af6bf6d9 controls/PouInstanceVariablesPanel.py
--- a/controls/PouInstanceVariablesPanel.py	Wed Aug 16 13:49:02 2017 +0300
+++ b/controls/PouInstanceVariablesPanel.py	Wed Aug 16 13:56:36 2017 +0300
@@ -145,11 +145,11 @@
 
         self.VariablesList = CustomTreeCtrlWithRightImage(self,
               style=wx.SUNKEN_BORDER,
-              agwStyle=CT.TR_NO_BUTTONS              |
-                       CT.TR_SINGLE                  |
+              agwStyle=CT.TR_NO_BUTTONS |
+                       CT.TR_SINGLE |
                        CT.TR_HAS_VARIABLE_ROW_HEIGHT |
-                       CT.TR_HIDE_ROOT               |
-                       CT.TR_NO_LINES                |
+                       CT.TR_HIDE_ROOT |
+                       CT.TR_NO_LINES |
                        getattr(CT, "TR_ALIGN_WINDOWS_RIGHT", CT.TR_ALIGN_WINDOWS))
         self.VariablesList.SetIndent(0)
         self.VariablesList.SetSpacing(5)