diff --git a/intl/unicharutil/util/nsSpecialCasingData.h b/intl/unicharutil/util/nsSpecialCasingData.h
index e7631df89bf8..52a987983291 100644
--- a/intl/unicharutil/util/nsSpecialCasingData.h
+++ b/intl/unicharutil/util/nsSpecialCasingData.h
@@ -2,7 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#include "prtypes.h"
 #include <stdint.h>
 
 namespace mozilla {