diff --git a/include/trace/syscall.h b/include/trace/syscall.h
index 1531eef..dff9371 100644
--- a/include/trace/syscall.h
+++ b/include/trace/syscall.h
@@ -32,6 +32,7 @@
 
 #ifdef CONFIG_FTRACE_SYSCALLS
 extern unsigned long arch_syscall_addr(int nr);
+extern int init_syscall_trace(struct ftrace_event_call *call);
 
 extern int syscall_enter_format(struct ftrace_event_call *call,
 				struct trace_seq *s);