diff --git a/mozilla/content/html/content/src/nsImageMapUtils.cpp b/mozilla/content/html/content/src/nsImageMapUtils.cpp
index 6d46747c5c5..4fdddfdc7ed 100644
--- a/mozilla/content/html/content/src/nsImageMapUtils.cpp
+++ b/mozilla/content/html/content/src/nsImageMapUtils.cpp
@@ -37,6 +37,7 @@
  * ***** END LICENSE BLOCK ***** */
 
 #include "nsString.h"
+#include "nsReadableUtils.h"
 #include "nsCOMPtr.h"
 #include "nsIDocument.h"
 #include "nsIHTMLDocument.h"
diff --git a/mozilla/content/shared/src/nsImageMapUtils.cpp b/mozilla/content/shared/src/nsImageMapUtils.cpp
index 6d46747c5c5..4fdddfdc7ed 100644
--- a/mozilla/content/shared/src/nsImageMapUtils.cpp
+++ b/mozilla/content/shared/src/nsImageMapUtils.cpp
@@ -37,6 +37,7 @@
  * ***** END LICENSE BLOCK ***** */
 
 #include "nsString.h"
+#include "nsReadableUtils.h"
 #include "nsCOMPtr.h"
 #include "nsIDocument.h"
 #include "nsIHTMLDocument.h"