diff --git a/widget/src/motif/nsXtManageWidget.h b/widget/src/motif/nsXtManageWidget.h
index f4924f005bdf..45a990ac06dd 100644
--- a/widget/src/motif/nsXtManageWidget.h
+++ b/widget/src/motif/nsXtManageWidget.h
@@ -24,7 +24,7 @@
 #ifndef _FE_NEWMANAGE_H_
 #define _FE_NEWMANAGE_H_
 
-#include <Xm/Xm.h>
+#include "Xm/Xm.h"
 
 extern WidgetClass newManageClass;
 typedef struct _NewManageClassRec *NewManageClass;
diff --git a/widget/src/motif/nsXtManageWidgetP.h b/widget/src/motif/nsXtManageWidgetP.h
index d102912d23ef..aa7db6f06e09 100644
--- a/widget/src/motif/nsXtManageWidgetP.h
+++ b/widget/src/motif/nsXtManageWidgetP.h
@@ -25,7 +25,7 @@
 #define _nsXtManageWidth_h_
 
 #include "nsXtManageWidget.h"
-#include <Xm/ManagerP.h>
+#include "Xm/ManagerP.h"
 
 typedef struct
 {