diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index aef9058537d5..baec63134ab6 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -138,7 +138,7 @@ cpumask_var_t __read_mostly	tracing_buffer_mask;
  * by commas.
  */
 /* Set to string format zero to disable by default */
-char ftrace_dump_on_oops[MAX_TRACER_SIZE] = "0";
+static char ftrace_dump_on_oops[MAX_TRACER_SIZE] = "0";
 
 /* When set, tracing will stop when a WARN*() is hit */
 static int __disable_trace_on_warning;