diff --git a/src/libs/languageserverprotocol/jsonkeys.h b/src/libs/languageserverprotocol/jsonkeys.h
index e5b07c064c0..f9ef7b4bedb 100644
--- a/src/libs/languageserverprotocol/jsonkeys.h
+++ b/src/libs/languageserverprotocol/jsonkeys.h
@@ -3,22 +3,10 @@
 
 #pragma once
 
-#include <QtGlobal>
-
-#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
-#include <QLatin1StringView>
-#else
-#include <QLatin1String>
-#endif
+#include "jsonobject.h"
 
 namespace LanguageServerProtocol {
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
-using Key = QLatin1StringView;
-#else
-using Key = QLatin1String;
-#endif
-
 constexpr Key actionsKey{"actions"};
 constexpr Key activeParameterKey{"activeParameter"};
 constexpr Key activeParameterSupportKey{"activeParameterSupport"};
diff --git a/src/libs/languageserverprotocol/jsonobject.h b/src/libs/languageserverprotocol/jsonobject.h
index 6c5f7510b79..178e74e5ad7 100644
--- a/src/libs/languageserverprotocol/jsonobject.h
+++ b/src/libs/languageserverprotocol/jsonobject.h
@@ -10,8 +10,27 @@
 #include <QDebug>
 #include <QJsonObject>
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
+#include <QLatin1StringView>
+#else
+#include <QLatin1String>
+#endif
+
 namespace LanguageServerProtocol {
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
+using Key = QLatin1StringView;
+#else
+class Key : public QLatin1String
+{
+public:
+    using QLatin1String::QLatin1String;
+    constexpr inline explicit Key(const char *s) noexcept
+        : QLatin1String(s, std::char_traits<char>::length(s))
+    {}
+};
+#endif
+
 class LANGUAGESERVERPROTOCOL_EXPORT JsonObject
 {
 public:
@@ -43,11 +62,6 @@ public:
     const_iterator end() const { return m_jsonObject.end(); }
 
 protected:
-#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
-    using Key = QLatin1StringView;
-#else
-    using Key = QLatin1String;
-#endif
     iterator insert(const Key key, const JsonObject &value);
     iterator insert(const Key key, const QJsonValue &value);
 
diff --git a/src/plugins/clangcodemodel/clangdclient.cpp b/src/plugins/clangcodemodel/clangdclient.cpp
index 7ed88a63d10..e5e5142370d 100644
--- a/src/plugins/clangcodemodel/clangdclient.cpp
+++ b/src/plugins/clangcodemodel/clangdclient.cpp
@@ -88,6 +88,8 @@ using namespace Utils;
 namespace ClangCodeModel {
 namespace Internal {
 
+using Key = LanguageServerProtocol::Key;
+
 Q_LOGGING_CATEGORY(clangdLog, "qtc.clangcodemodel.clangd", QtWarningMsg);
 Q_LOGGING_CATEGORY(clangdLogAst, "qtc.clangcodemodel.clangd.ast", QtWarningMsg);
 static Q_LOGGING_CATEGORY(clangdLogServer, "qtc.clangcodemodel.clangd.server", QtWarningMsg);
diff --git a/src/plugins/clangcodemodel/clangdcompletion.cpp b/src/plugins/clangcodemodel/clangdcompletion.cpp
index c10c48685fc..a10ba815df3 100644
--- a/src/plugins/clangcodemodel/clangdcompletion.cpp
+++ b/src/plugins/clangcodemodel/clangdcompletion.cpp
@@ -624,7 +624,7 @@ IAssistProposal *ClangdFunctionHintProcessor::perform()
 ClangdCompletionCapabilities::ClangdCompletionCapabilities(const JsonObject &object)
     : TextDocumentClientCapabilities::CompletionCapabilities(object)
 {
-    insert(Key{"editsNearCursor"}, true); // For dot-to-arrow correction.
+    insert(LanguageServerProtocol::Key{"editsNearCursor"}, true); // For dot-to-arrow correction.
     if (std::optional<CompletionItemCapbilities> completionItemCaps = completionItem()) {
         completionItemCaps->setSnippetSupport(false);
         setCompletionItem(*completionItemCaps);
diff --git a/src/plugins/clangcodemodel/clangdmemoryusagewidget.cpp b/src/plugins/clangcodemodel/clangdmemoryusagewidget.cpp
index c38986155a7..6c1df596afb 100644
--- a/src/plugins/clangcodemodel/clangdmemoryusagewidget.cpp
+++ b/src/plugins/clangcodemodel/clangdmemoryusagewidget.cpp
@@ -46,8 +46,8 @@ public:
         return components;
     }
 
-    static constexpr Key totalKey{"_total"};
-    static constexpr Key selfKey{"_self"};
+    static constexpr LanguageServerProtocol::Key totalKey{"_total"};
+    static constexpr LanguageServerProtocol::Key selfKey{"_self"};
 };
 
 
diff --git a/src/plugins/coco/cocolanguageclient.cpp b/src/plugins/coco/cocolanguageclient.cpp
index 8b517729c01..1ef02a071e5 100644
--- a/src/plugins/coco/cocolanguageclient.cpp
+++ b/src/plugins/coco/cocolanguageclient.cpp
@@ -26,6 +26,8 @@ using namespace Core;
 
 namespace Coco {
 
+using Key = LanguageServerProtocol::Key;
+
 CocoLanguageClient::CocoLanguageClient(const FilePath &coco, const FilePath &csmes)
     : Client(clientInterface(coco, csmes))
 {
diff --git a/src/plugins/copilot/requests/checkstatus.h b/src/plugins/copilot/requests/checkstatus.h
index 6f58f760241..4bd0026ca45 100644
--- a/src/plugins/copilot/requests/checkstatus.h
+++ b/src/plugins/copilot/requests/checkstatus.h
@@ -10,8 +10,8 @@ namespace Copilot {
 
 class CheckStatusParams : public LanguageServerProtocol::JsonObject
 {
-    static constexpr Key optionsKey{"options"};
-    static constexpr Key localChecksOnlyKey{"options"};
+    static constexpr LanguageServerProtocol::Key optionsKey{"options"};
+    static constexpr LanguageServerProtocol::Key localChecksOnlyKey{"options"};
 
 public:
     using JsonObject::JsonObject;
@@ -30,8 +30,8 @@ public:
 
 class CheckStatusResponse : public LanguageServerProtocol::JsonObject
 {
-    static constexpr Key userKey{"user"};
-    static constexpr Key statusKey{"status"};
+    static constexpr LanguageServerProtocol::Key userKey{"user"};
+    static constexpr LanguageServerProtocol::Key statusKey{"status"};
 
 public:
     using JsonObject::JsonObject;
diff --git a/src/plugins/copilot/requests/getcompletions.h b/src/plugins/copilot/requests/getcompletions.h
index ea42560725d..3630c086cd1 100644
--- a/src/plugins/copilot/requests/getcompletions.h
+++ b/src/plugins/copilot/requests/getcompletions.h
@@ -11,8 +11,8 @@ namespace Copilot {
 
 class Completion : public LanguageServerProtocol::JsonObject
 {
-    static constexpr Key displayTextKey{"displayText"};
-    static constexpr Key uuidKey{"uuid"};
+    static constexpr LanguageServerProtocol::Key displayTextKey{"displayText"};
+    static constexpr LanguageServerProtocol::Key uuidKey{"uuid"};
 
 public:
     using JsonObject::JsonObject;
@@ -41,7 +41,7 @@ public:
 class GetCompletionParams : public LanguageServerProtocol::JsonObject
 {
 public:
-    static constexpr Key docKey{"doc"};
+    static constexpr LanguageServerProtocol::Key docKey{"doc"};
 
     GetCompletionParams(const LanguageServerProtocol::TextDocumentIdentifier &document,
                         int version,
@@ -95,7 +95,7 @@ public:
 
 class GetCompletionResponse : public LanguageServerProtocol::JsonObject
 {
-    static constexpr Key completionKey{"completions"};
+    static constexpr LanguageServerProtocol::Key completionKey{"completions"};
 
 public:
     using JsonObject::JsonObject;