diff --git a/Fwk/AppFwk/cafUserInterface/cafPdmUiPushButtonEditor.cpp b/Fwk/AppFwk/cafUserInterface/cafPdmUiPushButtonEditor.cpp
index 57f1e449cf..f59ea4b034 100644
--- a/Fwk/AppFwk/cafUserInterface/cafPdmUiPushButtonEditor.cpp
+++ b/Fwk/AppFwk/cafUserInterface/cafPdmUiPushButtonEditor.cpp
@@ -45,7 +45,10 @@
 #include "cafPdmField.h"
 
 #include "cafFactory.h"
-#include "QBoxLayout"
+
+#include <QBoxLayout>
+
+#include <cmath>