diff --git a/mozilla/content/base/src/nsRange.cpp b/mozilla/content/base/src/nsRange.cpp
index a9d4db9fc54..b13ccd6a36a 100644
--- a/mozilla/content/base/src/nsRange.cpp
+++ b/mozilla/content/base/src/nsRange.cpp
@@ -21,6 +21,8 @@
  * nsRange.cpp: Implementation of the nsIDOMRange object.
  */
 
+#include "nsIDOMRange.h"
+
 class nsRange : public nsIDOMRange
 {
 public:
diff --git a/mozilla/layout/base/src/nsRange.cpp b/mozilla/layout/base/src/nsRange.cpp
index a9d4db9fc54..b13ccd6a36a 100644
--- a/mozilla/layout/base/src/nsRange.cpp
+++ b/mozilla/layout/base/src/nsRange.cpp
@@ -21,6 +21,8 @@
  * nsRange.cpp: Implementation of the nsIDOMRange object.
  */
 
+#include "nsIDOMRange.h"
+
 class nsRange : public nsIDOMRange
 {
 public: