--- a/dom/base/nsGenericDOMDataNode.cpp
+++ b/dom/base/nsGenericDOMDataNode.cpp
@@ -27,16 +27,17 @@
 #include "nsDOMString.h"
 #include "nsChangeHint.h"
 #include "nsCOMArray.h"
 #include "nsNodeUtils.h"
 #include "mozilla/dom/DirectionalityUtils.h"
 #include "nsBindingManager.h"
 #include "nsCCUncollectableMarker.h"
 #include "mozAutoDocUpdate.h"
+#include "nsTextNode.h"
 
 #include "PLDHashTable.h"
 #include "mozilla/Snprintf.h"
 #include "nsWrapperCacheInlines.h"
 
 using namespace mozilla;
 using namespace mozilla::dom;