diff --git a/editor/base/nsEditor.h b/editor/base/nsEditor.h
index 5ddaecf8003c..fde82734a71e 100644
--- a/editor/base/nsEditor.h
+++ b/editor/base/nsEditor.h
@@ -45,6 +45,7 @@
 #include "nsIDOMCharacterData.h"
 #include "nsICSSStyleSheet.h"
 #include "nsIDTD.h"
+#include "nsIDOMElement.h"
 
 class nsIEditActionListener;
 class nsIDocumentStateListener;
diff --git a/editor/libeditor/base/nsEditor.h b/editor/libeditor/base/nsEditor.h
index 5ddaecf8003c..fde82734a71e 100644
--- a/editor/libeditor/base/nsEditor.h
+++ b/editor/libeditor/base/nsEditor.h
@@ -45,6 +45,7 @@
 #include "nsIDOMCharacterData.h"
 #include "nsICSSStyleSheet.h"
 #include "nsIDTD.h"
+#include "nsIDOMElement.h"
 
 class nsIEditActionListener;
 class nsIDocumentStateListener;