diff --git a/src/plugins/qt4projectmanager/qt-maemo/maemoqemumanager.cpp b/src/plugins/qt4projectmanager/qt-maemo/maemoqemumanager.cpp
index d782e508182..71209aa6ea4 100644
--- a/src/plugins/qt4projectmanager/qt-maemo/maemoqemumanager.cpp
+++ b/src/plugins/qt4projectmanager/qt-maemo/maemoqemumanager.cpp
@@ -58,6 +58,8 @@
 
 #include <QtXml/QXmlStreamReader>
 
+#include <limits.h>
+
 using namespace ProjectExplorer;
 using namespace Qt4ProjectManager;
 using namespace Qt4ProjectManager::Internal;
@@ -71,7 +73,7 @@ MaemoQemuManager::MaemoQemuManager(QObject *parent)
     : QObject(parent)
     , m_qemuAction(0)
     , m_qemuProcess(new QProcess(this))
-    , m_runningQtId(-1)
+    , m_runningQtId(INT_MIN)
     , m_userTerminated(false)
 {
     m_qemuStarterIcon.addFile(":/qt-maemo/images/qemu-run.png", iconSize);
@@ -412,7 +414,7 @@ void MaemoQemuManager::terminateRuntime()
 
 void MaemoQemuManager::qemuProcessFinished()
 {
-    m_runningQtId = -1;
+    m_runningQtId = INT_MIN;
     QemuStatus status = QemuFinished;
     QString error;
 
@@ -546,7 +548,7 @@ void MaemoQemuManager::toggleStarterButton(Target *target)
         }
     }
 
-    if (m_runtimes.isEmpty() || !m_runtimes.contains(uniqueId))
+    if (uniqueId >= 0 && (m_runtimes.isEmpty() || !m_runtimes.contains(uniqueId)))
         qtVersionsChanged(QList<int>() << uniqueId);
 
     bool isRunning = m_qemuProcess->state() != QProcess::NotRunning;