diff --git a/src/core/bufferfragment_p.h b/src/core/bufferfragment_p.h
--- a/src/core/bufferfragment_p.h
+++ b/src/core/bufferfragment_p.h
@@ -150,7 +150,7 @@
         return (other.size() != (int)len || memcmp(d, other.constData(), len) != 0);
     }
 
-    bool operator==(const BufferFragment &other) const
+    bool operator==(const BufferFragment other) const
     {
         return other.len == len && !memcmp(d, other.d, len);
     }
@@ -195,7 +195,7 @@
     unsigned int len;
 };
 
-uint qHash(const KConfigIniBackend::BufferFragment &fragment)
+uint qHash(const KConfigIniBackend::BufferFragment fragment)
 {
     const uchar *p = reinterpret_cast<const uchar*>(fragment.constData());
     const int len = fragment.length();
diff --git a/src/core/kconfigini.cpp b/src/core/kconfigini.cpp
--- a/src/core/kconfigini.cpp
+++ b/src/core/kconfigini.cpp
@@ -44,7 +44,7 @@
 
 KCONFIGCORE_EXPORT bool kde_kiosk_exception = false; // flag to disable kiosk restrictions
 
-static QByteArray lookup(const KConfigIniBackend::BufferFragment &fragment, QHash<KConfigIniBackend::BufferFragment, QByteArray> *cache)
+static QByteArray lookup(const KConfigIniBackend::BufferFragment fragment, QHash<KConfigIniBackend::BufferFragment, QByteArray> *cache)
 {
     auto it = cache->constFind(fragment);
     if (it != cache->constEnd()) {