diff --git a/src/slic3r/GUI/MainFrame.hpp b/src/slic3r/GUI/MainFrame.hpp
index 9a0f3ca783..c8e2c5cfa7 100644
--- a/src/slic3r/GUI/MainFrame.hpp
+++ b/src/slic3r/GUI/MainFrame.hpp
@@ -222,8 +222,8 @@ public:
         tpPreview       = 2,
         tpMonitor       = 3,
         tpProject       = 4,
-        tpAuxiliary     = 5,
-        tpCalibration   = 6,
+        tpCalibration   = 5,
+        tpAuxiliary     = 6,
         toDebugTool     = 7,
     };