diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index 033d66d..dd824cf 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -13,7 +13,7 @@
 #include "util.h"
 
 int verbose = 0;
-int dump_trace = 0;
+bool dump_trace = false;
 
 int eprintf(int level, const char *fmt, ...)
 {