diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -240,6 +240,7 @@
         Archive
         Config
         WidgetsAddons
+        Auth
         Completion
         CoreAddons
         GuiAddons
@@ -249,6 +250,15 @@
         WindowSystem
 )
 
+# KAuth deprecated authorizeKAction. In order to be warning free,
+# compile with the updated function when the dependency is new enough.
+# Remove this (and the uses of the define) when the minimum KF5
+# version is >= 5.24.0.
+if (${KF5Auth_VERSION} VERSION_LESS "5.24.0" )
+    message("Old KAuth (< 5.24.0) found.")
+    add_definitions(-DKAUTH_BEFORE_5_24)
+endif()
+
 find_package(Qt5 ${MIN_QT_VERSION}
         REQUIRED COMPONENTS
         Core
diff --git a/libs/widgetutils/xmlgui/kactioncollection.cpp b/libs/widgetutils/xmlgui/kactioncollection.cpp
--- a/libs/widgetutils/xmlgui/kactioncollection.cpp
+++ b/libs/widgetutils/xmlgui/kactioncollection.cpp
@@ -47,6 +47,10 @@
 
 #include <stdio.h>
 
+#if defined(KAUTH_BEFORE_5_24)
+# define authorizeAction authorizeKAction
+#endif
+
 class KActionCollectionPrivate
 {
 public:
@@ -291,7 +295,7 @@
         return action;
     }
 
-    if (!KAuthorized::authorizeKAction(indexName)) {
+    if (!KAuthorized::authorizeAction(indexName)) {
         // Disable this action
         action->setEnabled(false);
         action->setVisible(false);
diff --git a/libs/widgetutils/xmlgui/ktoolbarhandler.cpp b/libs/widgetutils/xmlgui/ktoolbarhandler.cpp
--- a/libs/widgetutils/xmlgui/ktoolbarhandler.cpp
+++ b/libs/widgetutils/xmlgui/ktoolbarhandler.cpp
@@ -32,6 +32,10 @@
 #include "kxmlguifactory.h"
 #include "kactioncollection.h"
 
+#if defined(KAUTH_BEFORE_5_24)
+# define authorizeAction authorizeKAction
+#endif
+
 namespace
 {
 const char actionListName[] = "show_menu_and_toolbar_actionlist";
@@ -260,7 +264,7 @@
     // We have no XML file associated with our action collection, so load settings from KConfig
     actionCollection()->readSettings(); // #233712
 
-    if (KAuthorized::authorizeKAction(QStringLiteral("options_show_toolbar"))) {
+    if (KAuthorized::authorizeAction(QStringLiteral("options_show_toolbar"))) {
         plugActionList(QLatin1String(actionListName), d->actions);
     }
 
diff --git a/libs/widgetutils/xmlgui/kxmlguibuilder.cpp b/libs/widgetutils/xmlgui/kxmlguibuilder.cpp
--- a/libs/widgetutils/xmlgui/kxmlguibuilder.cpp
+++ b/libs/widgetutils/xmlgui/kxmlguibuilder.cpp
@@ -40,6 +40,10 @@
 
 #include <kis_icon_utils.h>
 
+#if defined(KAUTH_BEFORE_5_24)
+# define authorizeAction authorizeKAction
+#endif
+
 using namespace KDEPrivate;
 
 class KXMLGUIBuilderPrivate
@@ -166,7 +170,7 @@
 
         QString name = element.attribute(d->attrName);
 
-        if (!KAuthorized::authorizeKAction(name)) {
+        if (!KAuthorized::authorizeAction(name)) {
             return 0;
         }
 
diff --git a/libs/widgetutils/xmlgui/kxmlguiclient.cpp b/libs/widgetutils/xmlgui/kxmlguiclient.cpp
--- a/libs/widgetutils/xmlgui/kxmlguiclient.cpp
+++ b/libs/widgetutils/xmlgui/kxmlguiclient.cpp
@@ -40,6 +40,10 @@
 
 #include <assert.h>
 
+#if defined(KAUTH_BEFORE_5_24)
+# define authorizeAction authorizeKAction
+#endif
+
 class KXMLGUIClientPrivate
 {
 public:
@@ -429,7 +433,7 @@
             if (equalstr(tag, tagAction)) {
                 const QString name =  e.attribute(attrName);
                 if (!actionCollection->action(name) ||
-                        !KAuthorized::authorizeKAction(name)) {
+                        !KAuthorized::authorizeAction(name)) {
                     // remove this child as we aren't using it
                     base.removeChild(e);
                     continue;