diff --git a/src/frontends/qt/GuiBox.cpp b/src/frontends/qt/GuiBox.cpp
index 6a991b5df5..67a1b0c52b 100644
--- a/src/frontends/qt/GuiBox.cpp
+++ b/src/frontends/qt/GuiBox.cpp
@@ -155,7 +155,7 @@ GuiBox::GuiBox(QWidget * parent) : InsetParamsWidget(parent)
 
 	// the background can be uncolored while the frame cannot
 	color_codes_ = colors();
-	qSort(color_codes_.begin(), color_codes_.end(), ColorSorter);
+	sort(color_codes_.begin(), color_codes_.end(), ColorSorter);
 	fillComboColor(backgroundColorCO, true);
 	fillComboColor(frameColorCO, false);
 
diff --git a/src/frontends/qt/GuiCharacter.cpp b/src/frontends/qt/GuiCharacter.cpp
index 59b7ca3f0e..f06119a11c 100644
--- a/src/frontends/qt/GuiCharacter.cpp
+++ b/src/frontends/qt/GuiCharacter.cpp
@@ -237,7 +237,7 @@ GuiCharacter::GuiCharacter(GuiView & lv)
 	bar    = barData();
 	strike = strikeData();
 	color  = colorData();
-	qSort(color.begin(), color.end(), ColorSorter);
+	sort(color.begin(), color.end(), ColorSorter);
 
 	language = languageData();
 	language.prepend(LanguagePair(qt_("Default"), "reset"));
diff --git a/src/frontends/qt/GuiExternal.cpp b/src/frontends/qt/GuiExternal.cpp
index 7be6be0954..d850c2d8a5 100644
--- a/src/frontends/qt/GuiExternal.cpp
+++ b/src/frontends/qt/GuiExternal.cpp
@@ -206,7 +206,7 @@ GuiExternal::GuiExternal(GuiView & lv)
 		localizedTemplates.insert(qt_(i1->second.guiName), toqstr(i1->second.lyxName));
 	// Sort alphabetically by (localized) GUI name
 	QStringList keys = localizedTemplates.keys();
-	qSort(keys.begin(), keys.end(), SortLocaleAware);
+	sort(keys.begin(), keys.end(), SortLocaleAware);
 	for (QString & key : keys) {
 		QString const value = localizedTemplates[key];
 		externalCO->addItem(key, value);
diff --git a/src/frontends/qt/GuiPrefs.cpp b/src/frontends/qt/GuiPrefs.cpp
index 7d269bc104..6b00357446 100644
--- a/src/frontends/qt/GuiPrefs.cpp
+++ b/src/frontends/qt/GuiPrefs.cpp
@@ -1089,7 +1089,7 @@ PrefColors::PrefColors(GuiPreferences * form)
 			continue;
 		lcolors_.push_back(lc);
 	}
-	qSort(lcolors_.begin(), lcolors_.end(), ColorSorter);
+	sort(lcolors_.begin(), lcolors_.end(), ColorSorter);
 	vector<ColorCode>::const_iterator cit = lcolors_.begin();
 	vector<ColorCode>::const_iterator const end = lcolors_.end();
 	for (; cit != end; ++cit) {
diff --git a/src/frontends/qt/GuiRef.cpp b/src/frontends/qt/GuiRef.cpp
index 6f3a34258e..7e98e4864a 100644
--- a/src/frontends/qt/GuiRef.cpp
+++ b/src/frontends/qt/GuiRef.cpp
@@ -490,8 +490,8 @@ void GuiRef::redoRefs()
 		}
 	}
 	// sort categories case-intensively
-	qSort(refsCategories.begin(), refsCategories.end(),
-	      caseInsensitiveLessThan /*defined above*/);
+	sort(refsCategories.begin(), refsCategories.end(),
+		  caseInsensitiveLessThan /*defined above*/);
 	if (noprefix)
 		refsCategories.insert(0, qt_("<No prefix>"));
 
@@ -499,10 +499,10 @@ void GuiRef::redoRefs()
 				sortingCO->itemData(sortingCO->currentIndex()).toString()
 				: QString();
 	if (sort == "nocase")
-		qSort(refsStrings.begin(), refsStrings.end(),
-		      caseInsensitiveLessThan /*defined above*/);
+		std::sort(refsStrings.begin(), refsStrings.end(),
+			  caseInsensitiveLessThan /*defined above*/);
 	else if (sort == "case")
-		qSort(refsStrings.begin(), refsStrings.end());
+		std::sort(refsStrings.begin(), refsStrings.end());
 
 	if (groupCB->isChecked()) {
 		QList<QTreeWidgetItem *> refsCats;