diff --git a/content/base/src/nsRange.cpp b/content/base/src/nsRange.cpp
index 0fdc54b3844..b00f50b0375 100644
--- a/content/base/src/nsRange.cpp
+++ b/content/base/src/nsRange.cpp
@@ -21,6 +21,7 @@
  */
 
 #include "nsIDOMRange.h"
+#include "nsIDOMElement.h"
 
 static NS_DEFINE_IID(kIRangeIID, NS_IDOMRANGE_IID);
 
diff --git a/layout/base/src/nsRange.cpp b/layout/base/src/nsRange.cpp
index 0fdc54b3844..b00f50b0375 100644
--- a/layout/base/src/nsRange.cpp
+++ b/layout/base/src/nsRange.cpp
@@ -21,6 +21,7 @@
  */
 
 #include "nsIDOMRange.h"
+#include "nsIDOMElement.h"
 
 static NS_DEFINE_IID(kIRangeIID, NS_IDOMRANGE_IID);