1 files changed, 2 insertions, 1 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index cb98b5af9e17..8b10621b415c 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -67,7 +67,8 @@ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
         char filename[PATH_MAX];
         char bf[4096];
         int fd;
-        size_t size = 0, n;
+        size_t size = 0;
+        ssize_t n;
         char *nl, *name, *tgids, *ppids;
 
         *tgid = -1;