diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -140,7 +140,7 @@
     GROUP_BASE_NAME KF
     VERSION ${KF5_VERSION}
     DEPRECATED_BASE_VERSION 0
-    DEPRECATION_VERSIONS 4.0 5.0 5.2
+    DEPRECATION_VERSIONS 4.0 5.0 5.2 5.65
     EXCLUDE_DEPRECATED_BEFORE_AND_AT ${EXCLUDE_DEPRECATED_BEFORE_AND_AT}
 )
 
diff --git a/src/lib/kaboutdata.h b/src/lib/kaboutdata.h
--- a/src/lib/kaboutdata.h
+++ b/src/lib/kaboutdata.h
@@ -469,12 +469,18 @@
      */
     static KAboutData *pluginData(const QString &componentName);
 
+#if KCOREADDONS_ENABLE_DEPRECATED_SINCE(5, 65)
     /**
      * Creates a @c KAboutData from the given @p plugin metadata
      *
      * @since 5.18
+     * @deprecated Since 5.65, use KAboutPluginDialog to show info about a plugin
+     * instead of KAboutApplicationDialogso, with the latter having had been the
+     * only known need for this conversion.
      */
+    KCOREADDONS_DEPRECATED_VERSION(5, 65, "See API docs")
     static KAboutData fromPluginMetaData(const KPluginMetaData &plugin);
+#endif
 
 public:
     /**
diff --git a/src/lib/kaboutdata.cpp b/src/lib/kaboutdata.cpp
--- a/src/lib/kaboutdata.cpp
+++ b/src/lib/kaboutdata.cpp
@@ -608,6 +608,7 @@
     return *this;
 }
 
+#if KCOREADDONS_BUILD_DEPRECATED_SINCE(5, 65)
 KAboutData KAboutData::fromPluginMetaData(const KPluginMetaData &plugin)
 {
     KAboutData ret(plugin.pluginId(), plugin.name(), plugin.version(), plugin.description(),
@@ -621,6 +622,7 @@
     ret.d->_creditList = plugin.otherContributors();
     return ret;
 }
+#endif
 
 
 KAboutData &KAboutData::addAuthor(const QString &name,