diff --git a/src/plugins/qt4projectmanager/profilecompletionassist.cpp b/src/plugins/qt4projectmanager/profilecompletionassist.cpp
index 94f998ea67a..fc81a7b3ca4 100644
--- a/src/plugins/qt4projectmanager/profilecompletionassist.cpp
+++ b/src/plugins/qt4projectmanager/profilecompletionassist.cpp
@@ -227,5 +227,6 @@ ProFileAssistProposalModel::~ProFileAssistProposalModel()
 
 bool ProFileAssistProposalModel::isSortable(const QString &prefix) const
 {
+    Q_UNUSED(prefix)
     return false;
 }