diff --git a/src/frontends/qt4/GuiWorkArea.cpp b/src/frontends/qt4/GuiWorkArea.cpp
index 0b6659a77c..e5f7673949 100644
--- a/src/frontends/qt4/GuiWorkArea.cpp
+++ b/src/frontends/qt4/GuiWorkArea.cpp
@@ -310,6 +310,7 @@ GuiWorkArea::~GuiWorkArea()
 	buffer_view_->buffer().workAreaManager().remove(this);
 	delete buffer_view_;
 	delete cursor_;
+	delete completer_;
 }