diff --git a/src/core/global.h b/src/core/global.h
--- a/src/core/global.h
+++ b/src/core/global.h
@@ -141,8 +141,11 @@
  * in that directory. The existence is only checked for local urls though.
  * The suggested file name is of the form "foo 1", "foo 2" etc.
  * @since 5.0
+ * @deprecated since 5.61, use KFileUtils::suggestName() from KCoreAddons
  */
-KIOCORE_EXPORT QString suggestName(const QUrl &baseURL, const QString &oldName);
+#ifndef KIOCORE_NO_DEPRECATED
+KIOCORE_DEPRECATED_EXPORT QString suggestName(const QUrl &baseURL, const QString &oldName);
+#endif
 
 /**
  * Error codes that can be emitted by KIO.
diff --git a/src/core/global.cpp b/src/core/global.cpp
--- a/src/core/global.cpp
+++ b/src/core/global.cpp
@@ -296,7 +296,9 @@
     return u.adjusted(QUrl::RemoveFilename);
 }
 
+#ifndef KIOCORE_NO_DEPRECATED
 QString KIO::suggestName(const QUrl &baseURL, const QString &oldName)
 {
     return KFileUtils::suggestName(baseURL, oldName);
 }
+#endif