diff --git a/src/app/valentina/mainwindow.h b/src/app/valentina/mainwindow.h
index 87e5aa907..0e7d1d790 100644
--- a/src/app/valentina/mainwindow.h
+++ b/src/app/valentina/mainwindow.h
@@ -199,6 +199,8 @@ private:
 
     /** @brief isInitialized true after first show window. */
     bool               isInitialized;
+
+    /** @brief mChanges true if measurement file was changed. */
     bool               mChanges;
 
     DialogIncrements   *dialogTable;