diff --git a/src/lib/caching/kshareddatacache.h b/src/lib/caching/kshareddatacache.h
--- a/src/lib/caching/kshareddatacache.h
+++ b/src/lib/caching/kshareddatacache.h
@@ -82,6 +82,9 @@
                      unsigned expectedItemSize = 0);
     ~KSharedDataCache();
 
+    KSharedDataCache(const KSharedDataCache &) = delete;
+    KSharedDataCache &operator=(const KSharedDataCache &) = delete;
+
     enum EvictionPolicy {
         // The default value for data in our shared memory will be 0, so it is
         // important that whatever we want for the default value is also 0.
diff --git a/src/lib/util/kdelibs4configmigrator.h b/src/lib/util/kdelibs4configmigrator.h
--- a/src/lib/util/kdelibs4configmigrator.h
+++ b/src/lib/util/kdelibs4configmigrator.h
@@ -50,6 +50,9 @@
      */
     ~Kdelibs4ConfigMigrator();
 
+    Kdelibs4ConfigMigrator(const Kdelibs4ConfigMigrator &) = delete;
+    Kdelibs4ConfigMigrator &operator=(const Kdelibs4ConfigMigrator &) = delete;
+
     /**
      * Migrate the files, if any.
      *
diff --git a/src/lib/util/kdelibs4migration.h b/src/lib/util/kdelibs4migration.h
--- a/src/lib/util/kdelibs4migration.h
+++ b/src/lib/util/kdelibs4migration.h
@@ -81,6 +81,9 @@
      */
     ~Kdelibs4Migration();
 
+    Kdelibs4Migration(const Kdelibs4Migration &) = delete;
+    Kdelibs4Migration &operator=(const Kdelibs4Migration &) = delete;
+
     /**
      * Returns true if a "kdehome" was found.
      * Otherwise, there is nothing to migrate.