diff --git a/src/irisnet/noncore/icetransport.h b/src/irisnet/noncore/icetransport.h
index 6dc3f939..5bf6ecef 100644
--- a/src/irisnet/noncore/icetransport.h
+++ b/src/irisnet/noncore/icetransport.h
@@ -60,7 +60,11 @@ class IceTransport : public QObject {
     void debugLine(const QString &str);
 };
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 inline uint qHash(const QWeakPointer<IceTransport> &p) { return qHash(p.toStrongRef().data()); }
+#else
+inline size_t qHash(const QWeakPointer<IceTransport> &p) { return qHash(p.toStrongRef().data()); }
+#endif
 
 } // namespace XMPP
 
diff --git a/src/irisnet/noncore/transportaddress.h b/src/irisnet/noncore/transportaddress.h
index ea450801..fec62a3c 100644
--- a/src/irisnet/noncore/transportaddress.h
+++ b/src/irisnet/noncore/transportaddress.h
@@ -23,7 +23,12 @@ class TransportAddress {
     }
 };
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+
 inline uint qHash(const TransportAddress &key, uint seed = 0)
+#else
+inline size_t qHash(const TransportAddress &key, size_t seed = 0)
+#endif
 {
     return ::qHash(key.addr, seed) ^ ::qHash(key.port, seed);
 }
diff --git a/src/xmpp/jid/jid.h b/src/xmpp/jid/jid.h
index 4c4ff08f..08966774 100644
--- a/src/xmpp/jid/jid.h
+++ b/src/xmpp/jid/jid.h
@@ -97,7 +97,7 @@ Q_DECL_PURE_FUNCTION inline uint qHash(const XMPP::Jid &key, uint seed = 0) Q_DE
     return qHash(key.full(), seed);
 }
 #else
-Q_DECL_PURE_FUNCTION inline uint qHash(const XMPP::Jid &key, size_t seed = 0) Q_DECL_NOTHROW
+Q_DECL_PURE_FUNCTION inline size_t qHash(const XMPP::Jid &key, size_t seed = 0) Q_DECL_NOTHROW
 {
     return qHash(key.full(), seed);
 }
diff --git a/src/xmpp/xmpp-im/jingle.h b/src/xmpp/xmpp-im/jingle.h
index 845977b8..6ea71c1b 100644
--- a/src/xmpp/xmpp-im/jingle.h
+++ b/src/xmpp/xmpp-im/jingle.h
@@ -43,7 +43,11 @@ namespace Jingle {
 
     enum class Origin { None, Both, Initiator, Responder };
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     inline uint qHash(const XMPP::Jingle::Origin &o, uint seed = 0) { return ::qHash(int(o), seed); }
+#else
+    inline size_t qHash(const XMPP::Jingle::Origin &o, size_t seed = 0) { return ::qHash(int(o), seed); }
+#endif
 
     /*
      Session states:
@@ -121,7 +125,11 @@ namespace Jingle {
         SessionTerminate
     };
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     inline uint qHash(const XMPP::Jingle::Action &o, uint seed = 0) { return ::qHash(int(o), seed); }
+#else
+    inline size_t qHash(const XMPP::Jingle::Action &o, size_t seed = 0) { return ::qHash(int(o), seed); }
+#endif
 
     /*
     Categorization by speed, reliability and connectivity
diff --git a/src/xmpp/xmpp-im/xmpp_externalservicediscovery.h b/src/xmpp/xmpp-im/xmpp_externalservicediscovery.h
index ec6f0d14..563603c2 100644
--- a/src/xmpp/xmpp-im/xmpp_externalservicediscovery.h
+++ b/src/xmpp/xmpp-im/xmpp_externalservicediscovery.h
@@ -66,7 +66,11 @@ struct ExternalServiceId {
     }
 };
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 inline uint qHash(const ExternalServiceId &id, uint seed = 0)
+#else
+inline size_t qHash(const ExternalServiceId &id, size_t seed = 0)
+#endif
 {
     return ::qHash(id.host, seed) ^ ::qHash(id.type, seed) ^ ::qHash(id.port, seed);
 }
diff --git a/src/xmpp/xmpp-im/xmpp_hash.h b/src/xmpp/xmpp-im/xmpp_hash.h
index 2c7d5de1..67400493 100644
--- a/src/xmpp/xmpp-im/xmpp_hash.h
+++ b/src/xmpp/xmpp-im/xmpp_hash.h
@@ -99,7 +99,11 @@ class StreamHash {
     std::unique_ptr<StreamHashPrivate> d;
 };
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 Q_DECL_PURE_FUNCTION inline uint qHash(const Hash &hash, uint seed = 0) Q_DECL_NOTHROW
+#else
+Q_DECL_PURE_FUNCTION inline size_t qHash(const Hash &hash, size_t seed = 0) Q_DECL_NOTHROW
+#endif
 {
     return qHash(hash.data(), seed);
 }