diff --git a/src/plugins/debugger/threadshandler.cpp b/src/plugins/debugger/threadshandler.cpp
index aa3e95c5c2e..4e0408bf06f 100644
--- a/src/plugins/debugger/threadshandler.cpp
+++ b/src/plugins/debugger/threadshandler.cpp
@@ -296,11 +296,6 @@ void ThreadsHandler::setCurrentThread(const Thread &thread)
     thread->update();
 }
 
-QString ThreadsHandler::pidForGroupId(const QString &groupId) const
-{
-    return m_pidForGroupId[groupId];
-}
-
 void ThreadsHandler::notifyGroupCreated(const QString &groupId, const QString &pid)
 {
     m_pidForGroupId[groupId] = pid;
diff --git a/src/plugins/debugger/threadshandler.h b/src/plugins/debugger/threadshandler.h
index 82082fb7474..db20dd95c69 100644
--- a/src/plugins/debugger/threadshandler.h
+++ b/src/plugins/debugger/threadshandler.h
@@ -81,7 +81,6 @@ public:
     Thread currentThread() const;
     Thread threadForId(const QString &id) const;
     void setCurrentThread(const Thread &thread);
-    QString pidForGroupId(const QString &groupId) const;
 
     void updateThread(const ThreadData &threadData);
     void setThreads(const GdbMi &data);