diff --git a/src/plugins/languageclient/languageclientfunctionhint.cpp b/src/plugins/languageclient/languageclientfunctionhint.cpp
index f554d4a3b0e..9c33b632314 100644
--- a/src/plugins/languageclient/languageclientfunctionhint.cpp
+++ b/src/plugins/languageclient/languageclientfunctionhint.cpp
@@ -95,6 +95,7 @@ IAssistProposal *FunctionHintProcessor::perform(const AssistInterface *interface
     auto uri = DocumentUri::fromFilePath(interface->filePath());
     SignatureHelpRequest request((TextDocumentPositionParams(TextDocumentIdentifier(uri), Position(cursor))));
     request.setResponseCallback([this](auto response) { this->handleSignatureResponse(response); });
+    m_client->addAssistProcessor(this);
     m_client->sendContent(request);
     m_currentRequest = request.id();
     return nullptr;