--- a/old-configure.in
+++ b/old-configure.in
@@ -3692,16 +3692,22 @@ then
         )
     ])
     AC_MSG_RESULT($ac_cv_sqlite_dbstat_vtab)
     CFLAGS="$_SAVE_CFLAGS"
     LIBS="$_SAVE_LIBS"
     if test "x$ac_cv_sqlite_dbstat_vtab" = "xno"; then
         AC_MSG_ERROR([System SQLite library is not compiled with SQLITE_ENABLE_DBSTAT_VTAB.])
     fi
+else
+    dnl ==============================
+    dnl === SQLite fdatasync check ===
+    dnl ==============================
+    dnl Check to see if fdatasync is available
+    AC_CHECK_FUNC(fdatasync)
 fi
 
 if test -n "$MOZ_SYSTEM_SQLITE"; then
     AC_DEFINE(MOZ_SYSTEM_SQLITE)
 fi
 AC_SUBST(MOZ_SYSTEM_SQLITE)
 
 dnl ========================================================