diff --git a/src/QGCFileDialog.cc b/src/QGCFileDialog.cc
index 9db00be5eb4cbe8e7319c7870e93a7be11e380bb..f547d16c3e274f1a764ca0df086a57f2eb5456e8 100644
--- a/src/QGCFileDialog.cc
+++ b/src/QGCFileDialog.cc
@@ -108,6 +108,7 @@ void QGCFileDialog::_validate(QString* selectedFilter, Options& options)
     Q_ASSERT(qgcApp());
     
     // Support for selectedFilter is not yet implemented through the unit test framework
+    Q_UNUSED(selectedFilter);
     Q_ASSERT(selectedFilter == NULL);
     
     // On OSX native dialog can hang so we always use Qt dialogs