diff --git a/gui/checkthread.cpp b/gui/checkthread.cpp
index d8ff97d00..b727816c9 100644
--- a/gui/checkthread.cpp
+++ b/gui/checkthread.cpp
@@ -173,6 +173,9 @@ void CheckThread::runAddonsAndTools(const ImportProject::FileSettings *fileSetti
                 case Standards::CPP17:
                     args << "-std=c++17";
                     break;
+                case Standards::CPP20:
+                    args << "-std=c++20";
+                    break;
                 };
             }
 
diff --git a/gui/mainwindow.cpp b/gui/mainwindow.cpp
index 0b8fd6971..73ebeda54 100644
--- a/gui/mainwindow.cpp
+++ b/gui/mainwindow.cpp
@@ -210,6 +210,7 @@ MainWindow::MainWindow(TranslationHandler* th, QSettings* settings) :
     mUI.mActionCpp11->setActionGroup(mCppStandardActions);
     mUI.mActionCpp14->setActionGroup(mCppStandardActions);
     mUI.mActionCpp17->setActionGroup(mCppStandardActions);
+    mUI.mActionCpp20->setActionGroup(mCppStandardActions);
 
     mUI.mActionEnforceC->setActionGroup(mSelectLanguageActions);
     mUI.mActionEnforceCpp->setActionGroup(mSelectLanguageActions);
@@ -294,6 +295,7 @@ void MainWindow::loadSettings()
     mUI.mActionCpp11->setChecked(standards.cpp == Standards::CPP11);
     mUI.mActionCpp14->setChecked(standards.cpp == Standards::CPP14);
     mUI.mActionCpp17->setChecked(standards.cpp == Standards::CPP17);
+    mUI.mActionCpp20->setChecked(standards.cpp == Standards::CPP20);
 
     // Main window settings
     const bool showMainToolbar = mSettings->value(SETTINGS_TOOLBARS_MAIN_SHOW, true).toBool();
@@ -372,6 +374,8 @@ void MainWindow::saveSettings() const
         mSettings->setValue(SETTINGS_STD_CPP, "C++14");
     if (mUI.mActionCpp17->isChecked())
         mSettings->setValue(SETTINGS_STD_CPP, "C++17");
+    if (mUI.mActionCpp20->isChecked())
+        mSettings->setValue(SETTINGS_STD_CPP, "C++20");
 
     // Main window settings
     mSettings->setValue(SETTINGS_TOOLBARS_MAIN_SHOW, mUI.mToolBarMain->isVisible());
diff --git a/gui/mainwindow.ui b/gui/mainwindow.ui
index ca0c47c89..a34a3b4eb 100644
--- a/gui/mainwindow.ui
+++ b/gui/mainwindow.ui
@@ -138,6 +138,7 @@
      <addaction name="mActionCpp11"/>
      <addaction name="mActionCpp14"/>
      <addaction name="mActionCpp17"/>
+     <addaction name="mActionCpp20"/>
     </widget>
     <widget class="QMenu" name="menuC_standard">
      <property name="title">
@@ -789,7 +790,7 @@
     <bool>true</bool>
    </property>
    <property name="checked">
-    <bool>true</bool>
+    <bool>false</bool>
    </property>
    <property name="text">
     <string>C++14</string>
@@ -819,6 +820,17 @@
     <string>C++17</string>
    </property>
   </action>
+  <action name="mActionCpp20">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="checked">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>C++20</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>