diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index ffacd46..9b336fd 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -301,7 +301,9 @@
 	sample_sw.period = sample->period;
 	sample_sw.time	 = sample->time;
 	perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
-				      &sample_sw, false);
+				      evsel->attr.sample_regs_user,
+				      evsel->attr.read_format, &sample_sw,
+				      false);
 	build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
 	return perf_event__repipe(tool, event_sw, &sample_sw, machine);
 }