diff --git a/src/plugins/debugger/debuggerprotocol.h b/src/plugins/debugger/debuggerprotocol.h
index a8006172ae5..02dabc5707c 100644
--- a/src/plugins/debugger/debuggerprotocol.h
+++ b/src/plugins/debugger/debuggerprotocol.h
@@ -36,9 +36,9 @@
 #include <QString>
 #include <QJsonValue>
 #include <QJsonObject>
+#include <QVector>
 
 #include <functional>
-#include <vector>
 
 namespace Debugger {
 namespace Internal {
@@ -136,7 +136,7 @@ public:
 
     QByteArray m_name;
     QByteArray m_data;
-    std::vector<GdbMi> m_children;
+    QVector<GdbMi> m_children;
 
     enum Type { Invalid, Const, Tuple, List };
 
@@ -150,7 +150,7 @@ public:
     bool isList() const { return m_type == List; }
 
     const QByteArray &data() const { return m_data; }
-    const std::vector<GdbMi> &children() const { return m_children; }
+    const QVector<GdbMi> &children() const { return m_children; }
     int childCount() const { return int(m_children.size()); }
 
     const GdbMi &childAt(int index) const { return m_children[index]; }
diff --git a/src/plugins/debugger/gdb/gdbengine.cpp b/src/plugins/debugger/gdb/gdbengine.cpp
index 75a36fdfbe3..670ba83a99c 100644
--- a/src/plugins/debugger/gdb/gdbengine.cpp
+++ b/src/plugins/debugger/gdb/gdbengine.cpp
@@ -3341,8 +3341,8 @@ void GdbEngine::handleThreadListIds(const DebuggerResponse &response)
     // "72^done,{thread-ids={thread-id="2",thread-id="1"},number-of-threads="2"}
     // In gdb 7.1+ additionally: current-thread-id="1"
     ThreadsHandler *handler = threadsHandler();
-    const std::vector<GdbMi> &items = response.data["thread-ids"].children();
-    for (size_t index = 0, n = items.size(); index != n; ++index) {
+    const QVector<GdbMi> &items = response.data["thread-ids"].children();
+    for (int index = 0, n = items.size(); index != n; ++index) {
         ThreadData thread;
         thread.id = ThreadId(items.at(index).toInt());
         handler->updateThread(thread);
diff --git a/src/plugins/debugger/threadshandler.cpp b/src/plugins/debugger/threadshandler.cpp
index ed41f3420ab..2ba066ec2c9 100644
--- a/src/plugins/debugger/threadshandler.cpp
+++ b/src/plugins/debugger/threadshandler.cpp
@@ -445,7 +445,7 @@ void ThreadsHandler::updateThreads(const GdbMi &data)
     // file="/.../app.cpp",fullname="/../app.cpp",line="1175"},
     // state="stopped",core="0"}],current-thread-id="1"
 
-    const std::vector<GdbMi> items = data["threads"].children();
+    const QVector<GdbMi> items = data["threads"].children();
     const int n = int(items.size());
     for (int index = 0; index != n; ++index) {
         const GdbMi item = items[index];