diff --git a/src/plugins/languageclient/languageclientfunctionhint.cpp b/src/plugins/languageclient/languageclientfunctionhint.cpp
index 91a9748b767..2092b758993 100644
--- a/src/plugins/languageclient/languageclientfunctionhint.cpp
+++ b/src/plugins/languageclient/languageclientfunctionhint.cpp
@@ -81,25 +81,10 @@ QString FunctionHintProposalModel::text(int index) const
            + label.mid(end).toHtmlEscaped();
 }
 
-class FunctionHintProcessor : public IAssistProcessor
-{
-public:
-    explicit FunctionHintProcessor(Client *client, const ProposalHandler &proposalHandler)
-        : m_client(client), m_proposalHandler(proposalHandler) {}
-    IAssistProposal *perform(const AssistInterface *interface) override;
-    bool running() override { return m_currentRequest.has_value(); }
-    bool needsRestart() const override { return true; }
-    void cancel() override;
-
-private:
-    void handleSignatureResponse(const SignatureHelpRequest::Response &response);
-    void processProposal(TextEditor::IAssistProposal *proposal);
-
-    QPointer<Client> m_client;
-    const ProposalHandler m_proposalHandler;
-    Utils::optional<MessageId> m_currentRequest;
-    int m_pos = -1;
-};
+FunctionHintProcessor::FunctionHintProcessor(Client *client, const ProposalHandler &proposalHandler)
+    : m_client(client)
+    , m_proposalHandler(proposalHandler)
+{}
 
 IAssistProposal *FunctionHintProcessor::perform(const AssistInterface *interface)
 {
diff --git a/src/plugins/languageclient/languageclientfunctionhint.h b/src/plugins/languageclient/languageclientfunctionhint.h
index e268c4fed08..5c12ef7ac62 100644
--- a/src/plugins/languageclient/languageclientfunctionhint.h
+++ b/src/plugins/languageclient/languageclientfunctionhint.h
@@ -25,9 +25,15 @@
 
 #pragma once
 
+#include "languageclient_global.h"
+
+#include <languageserverprotocol/languagefeatures.h>
 #include <texteditor/codeassist/completionassistprovider.h>
+#include <texteditor/codeassist/iassistprocessor.h>
 #include <utils/optional.h>
 
+#include <QPointer>
+
 namespace TextEditor { class IAssistProposal; }
 
 namespace LanguageClient {
@@ -36,7 +42,7 @@ class Client;
 
 using ProposalHandler = std::function<void(TextEditor::IAssistProposal *)>;
 
-class FunctionHintAssistProvider : public TextEditor::CompletionAssistProvider
+class LANGUAGECLIENT_EXPORT FunctionHintAssistProvider : public TextEditor::CompletionAssistProvider
 {
     Q_OBJECT
 
@@ -61,4 +67,24 @@ private:
     Client *m_client = nullptr; // not owned
 };
 
+class LANGUAGECLIENT_EXPORT FunctionHintProcessor : public TextEditor::IAssistProcessor
+{
+public:
+    explicit FunctionHintProcessor(Client *client, const ProposalHandler &proposalHandler);
+    TextEditor::IAssistProposal *perform(const TextEditor::AssistInterface *interface) override;
+    bool running() override { return m_currentRequest.has_value(); }
+    bool needsRestart() const override { return true; }
+    void cancel() override;
+
+private:
+    void handleSignatureResponse(
+        const LanguageServerProtocol::SignatureHelpRequest::Response &response);
+    void processProposal(TextEditor::IAssistProposal *proposal);
+
+    QPointer<Client> m_client;
+    const ProposalHandler m_proposalHandler;
+    Utils::optional<LanguageServerProtocol::MessageId> m_currentRequest;
+    int m_pos = -1;
+};
+
 } // namespace LanguageClient