diff --git a/src/AutoHideSideBar.cpp b/src/AutoHideSideBar.cpp
index 85e4b99..cae494d 100644
--- a/src/AutoHideSideBar.cpp
+++ b/src/AutoHideSideBar.cpp
@@ -321,7 +321,7 @@ int CAutoHideSideBar::visibleTabCount() const
 	int count = 0;
 	for (auto i = 0; i < tabCount(); i++)
 	{
-		if (tabAt(i)->isVisible())
+		if (tabAt(i)->isVisibleTo(parentWidget()))
 		{
 			count++;
 		}
diff --git a/src/AutoHideSideBar.h b/src/AutoHideSideBar.h
index 20a9e6a..1b0cab5 100644
--- a/src/AutoHideSideBar.h
+++ b/src/AutoHideSideBar.h
@@ -135,14 +135,14 @@ public:
 	int tabCount() const;
 
 	/**
-	 * Returns the number of visible tabs
+	 * Returns the number of visible tabs to its parent widget.
 	 */
 	int visibleTabCount() const;
 
 	/**
-	 * Returns true, if the sidebar contains visible tabs.
+	 * Returns true, if the sidebar contains visible tabs to its parent widget.
 	 * The function returns as soon as it finds the first visible tab.
-	 * That means, if you just want to find out if theee are visible tabs
+	 * That means, if you just want to find out if there are visible tabs
 	 * then this function is quicker than visibleTabCount()
 	 */
 	bool hasVisibleTabs() const;