diff --git a/include/FramelessHelper/Core/private/framelesshelpercore_global_p.h b/include/FramelessHelper/Core/private/framelesshelpercore_global_p.h
index 9e1dda2..892e041 100644
--- a/include/FramelessHelper/Core/private/framelesshelpercore_global_p.h
+++ b/include/FramelessHelper/Core/private/framelesshelpercore_global_p.h
@@ -117,7 +117,9 @@ enum class ExtraDataType : quint8
 };
 
 #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-FRAMELESSHELPER_CORE_API uint qHash(ExtraDataType key, uint seed = 0) noexcept;
+inline uint qHash(ExtraDataType key, uint seed = 0) noexcept {
+    return ::qHash(static_cast<quint8>(key), seed);
+}
 #endif
 
 struct FRAMELESSHELPER_CORE_API FramelessExtraData
diff --git a/src/core/framelesshelpercore_global.cpp b/src/core/framelesshelpercore_global.cpp
index 219f117..7b50ba5 100644
--- a/src/core/framelesshelpercore_global.cpp
+++ b/src/core/framelesshelpercore_global.cpp
@@ -26,7 +26,6 @@
 #include "framelesshelpercore_global_p.h"
 #include "versionnumber_p.h"
 #include "utils.h"
-#include <QtCore/qhashfunctions.h>
 #include <QtCore/qiodevice.h>
 #include <QtCore/qcoreapplication.h>
 #include <QtCore/qloggingcategory.h>
@@ -124,12 +123,6 @@ FramelessCallbacksPtr FramelessCallbacks::create()
     return std::make_shared<FramelessCallbacks>();
 }
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-uint qHash(ExtraDataType key, uint seed) noexcept {
-    return ::qHash(static_cast<quint8>(key), seed);
-}
-#endif
-
 FramelessExtraData::FramelessExtraData() = default;
 
 FramelessExtraData::~FramelessExtraData() = default;