1 files changed, 1 insertions, 1 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 5df829f5bbf4..74776558ddfb 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -304,7 +304,7 @@ static size_t hists__fprintf_nr_sample_events(struct hists *self,
         if (evname != NULL)
                 ret += fprintf(fp, " of event '%s'", evname);
 
-        ret += fprintf(fp, "\n# Event count (approx.): %lu", nr_events);
+        ret += fprintf(fp, "\n# Event count (approx.): %" PRIu64, nr_events);
         return ret + fprintf(fp, "\n#\n");
 }