diff --git a/mozilla/extensions/schema-validation/src/nsSchemaValidatorUtils.cpp b/mozilla/extensions/schema-validation/src/nsSchemaValidatorUtils.cpp
index 99fb5994f0a..4a666f9069b 100644
--- a/mozilla/extensions/schema-validation/src/nsSchemaValidatorUtils.cpp
+++ b/mozilla/extensions/schema-validation/src/nsSchemaValidatorUtils.cpp
@@ -50,6 +50,7 @@
 #include <stdlib.h>
 #include <math.h>
 #include <errno.h>
+#include <limits.h>
 #include "prlog.h"
 #include "prprf.h"
 #include "prtime.h"