--- a/xpcom/string/nsTextFormatter.h
+++ b/xpcom/string/nsTextFormatter.h
@@ -25,17 +25,16 @@
  **	%lld, %llu, %llx, %llX, %llo - 64 bit versions of above
  **	%s - utf8 string
  **	%S - char16_t string
  **	%c - character
  **	%p - pointer (deals with machine dependent pointer size)
  **	%f - float
  **	%g - float
  */
-#include "prio.h"
 #include <stdio.h>
 #include <stdarg.h>
 #include "nscore.h"
 #include "nsStringGlue.h"
 
 #ifdef XPCOM_GLUE
 #error "nsTextFormatter is not available in the standalone glue due to NSPR dependencies."
 #endif