diff --git a/src/plugins/platforms/windows/qwindowsscreen.cpp b/src/plugins/platforms/windows/qwindowsscreen.cpp
index 2165c56d3c9..6c86c47caac 100644
--- a/src/plugins/platforms/windows/qwindowsscreen.cpp
+++ b/src/plugins/platforms/windows/qwindowsscreen.cpp
@@ -122,12 +122,12 @@ namespace {
 struct DiRegKeyHandleTraits
 {
     using Type = HKEY;
-    static Type invalidValue()
+    static Type invalidValue() noexcept
     {
         // The setupapi.h functions return INVALID_HANDLE_VALUE when failing to open a registry key
         return reinterpret_cast<HKEY>(INVALID_HANDLE_VALUE);
     }
-    static bool close(Type handle) { return RegCloseKey(handle) == ERROR_SUCCESS; }
+    static bool close(Type handle) noexcept { return RegCloseKey(handle) == ERROR_SUCCESS; }
 };
 
 using DiRegKeyHandle = QUniqueHandle<DiRegKeyHandleTraits>;
@@ -135,11 +135,11 @@ using DiRegKeyHandle = QUniqueHandle<DiRegKeyHandleTraits>;
 struct DevInfoHandleTraits
 {
     using Type = HDEVINFO;
-    static Type invalidValue()
+    static Type invalidValue() noexcept
     {
         return reinterpret_cast<HDEVINFO>(INVALID_HANDLE_VALUE);
     }
-    static bool close(Type handle) { return SetupDiDestroyDeviceInfoList(handle) == TRUE; }
+    static bool close(Type handle) noexcept { return SetupDiDestroyDeviceInfoList(handle) == TRUE; }
 };
 
 using DevInfoHandle = QUniqueHandle<DevInfoHandleTraits>;
diff --git a/tests/auto/corelib/tools/quniquehandle/tst_quniquehandle.cpp b/tests/auto/corelib/tools/quniquehandle/tst_quniquehandle.cpp
index bc8f4685610..55647f3ee4b 100644
--- a/tests/auto/corelib/tools/quniquehandle/tst_quniquehandle.cpp
+++ b/tests/auto/corelib/tools/quniquehandle/tst_quniquehandle.cpp
@@ -76,7 +76,7 @@ struct TestTraits
 {
     using Type = GlobalResource::handle;
 
-    static bool close(Type handle)
+    static bool close(Type handle) noexcept
     {
         return GlobalResource::close(handle);
     }
@@ -267,7 +267,7 @@ private slots:
         {
             using Type = int;
 
-            static bool close(Type)
+            static bool close(Type) noexcept
             {
                 return true;
             }