1 files changed, 1 insertions, 1 deletions

diff --git a/tools/testing/selftests/timers/clocksource-switch.c b/tools/testing/selftests/timers/clocksource-switch.c
index 627ec7425f78..fd88e3025bed 100644
--- a/tools/testing/selftests/timers/clocksource-switch.c
+++ b/tools/testing/selftests/timers/clocksource-switch.c
@@ -97,7 +97,7 @@ int get_cur_clocksource(char *buf, size_t size)
 int change_clocksource(char *clocksource)
 {
         int fd;
-        size_t size;
+        ssize_t size;
 
         fd = open("/sys/devices/system/clocksource/clocksource0/current_clocksource", O_WRONLY);