diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index 1c327ef13a9aa799475e34038722d16757f7a5d8..60115252332668f2b39c4c868304b9187017b879 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -61,7 +61,7 @@ function_trace_call(unsigned long ip, unsigned long parent_ip,
 	struct trace_array *tr = func_trace;
 	struct trace_array_cpu *data;
 	unsigned long flags;
-	unsigned int bit;
+	int bit;
 	int cpu;
 	int pc;