diff --git a/[refs] b/[refs]
index 094419988a21..4e673ec4a914 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 22e9b917ab7ccd98046ad9428fb28967f0744605
+refs/heads/master: f956b3e40ad7b9f7c0d33b80fe78f57fedb74f49
diff --git a/trunk/arch/um/os-Linux/user_syms.c b/trunk/arch/um/os-Linux/user_syms.c
index 05f5ea8e83d2..45ffe46871e0 100644
--- a/trunk/arch/um/os-Linux/user_syms.c
+++ b/trunk/arch/um/os-Linux/user_syms.c
@@ -113,3 +113,8 @@ EXPORT_SYMBOL(__stack_smash_handler);
 
 extern long __guard __attribute__((weak));
 EXPORT_SYMBOL(__guard);
+
+#ifdef _FORTIFY_SOURCE
+extern int __sprintf_chk(char *str, int flag, size_t strlen, const char *format);
+EXPORT_SYMBOL(__sprintf_chk);
+#endif