diff --git a/src/frontends/qt4/GuiDocument.cpp b/src/frontends/qt4/GuiDocument.cpp
index 848f38194f..96ea215f08 100644
--- a/src/frontends/qt4/GuiDocument.cpp
+++ b/src/frontends/qt4/GuiDocument.cpp
@@ -52,6 +52,7 @@
 #include "Spacing.h"
 #include "TextClass.h"
 #include "Undo.h"
+#include "VSpace.h"
 
 #include "insets/InsetListingsParams.h"
 
diff --git a/src/frontends/qt4/LengthCombo.h b/src/frontends/qt4/LengthCombo.h
index 3e69de4865..4d32318787 100644
--- a/src/frontends/qt4/LengthCombo.h
+++ b/src/frontends/qt4/LengthCombo.h
@@ -14,7 +14,7 @@
 
 #include <QComboBox>
 
-#include "VSpace.h"
+#include "Length.h"
 
 
 namespace lyx {