diff --git a/include/FramelessHelper/Core/private/framelesshelpercore_global_p.h b/include/FramelessHelper/Core/private/framelesshelpercore_global_p.h
index 892e041..4ce2607 100644
--- a/include/FramelessHelper/Core/private/framelesshelpercore_global_p.h
+++ b/include/FramelessHelper/Core/private/framelesshelpercore_global_p.h
@@ -117,7 +117,7 @@ enum class ExtraDataType : quint8
 };
 
 #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-inline uint qHash(ExtraDataType key, uint seed = 0) noexcept {
+inline uint qHash(const ExtraDataType key, const uint seed = 0) noexcept {
     return ::qHash(static_cast<quint8>(key), seed);
 }
 #endif
diff --git a/src/core/utils_win.cpp b/src/core/utils_win.cpp
index 459f335..c65bc1c 100644
--- a/src/core/utils_win.cpp
+++ b/src/core/utils_win.cpp
@@ -1221,9 +1221,9 @@ QString Utils::getSystemErrorMessage(const QString &function)
     if (function.isEmpty()) {
         return {};
     }
-    const DWORD code = GetLastError();
+    const DWORD code = ::GetLastError();
     if (code == ERROR_SUCCESS) {
-        return {};
+        return kSuccessMessageText;
     }
     return getSystemErrorMessageImpl(function, code);
 }