diff --git a/mozilla/include/xp_qsort.h b/mozilla/include/xp_qsort.h
index 3a77df07fb5..ba386dc8da1 100644
--- a/mozilla/include/xp_qsort.h
+++ b/mozilla/include/xp_qsort.h
@@ -32,7 +32,7 @@
 extern "C" {
 #endif
 
-#if defined(SOLARIS) || defined(XP_MAC)
+#if !defined(HAVE_QSORT) || defined(BROKEN_QSORT) || defined(XP_MAC)
 extern void XP_QSORT(void *, size_t, size_t,
                      int (*)(const void *, const void *));
 #elif defined(XP_OS2)