diff --git a/src/frontends/qt4/GuiProgressView.cpp b/src/frontends/qt4/GuiProgressView.cpp
index fcb4ad61a8..fa01557e0c 100644
--- a/src/frontends/qt4/GuiProgressView.cpp
+++ b/src/frontends/qt4/GuiProgressView.cpp
@@ -15,6 +15,8 @@
 
 #include "qt_helpers.h"
 
+#include "support/debug.h"
+
 #include <QTime>
 
 
@@ -74,4 +76,4 @@ Dialog * createGuiProgressView(GuiView & guiview)
 } // namespace frontend
 } // namespace lyx
 
-#include "moc_GuiProgressView.cpp"
\ No newline at end of file
+#include "moc_GuiProgressView.cpp"