diff --git a/trace/simple.c b/trace/simple.c
index 5bb905c..1e3f691 100644
--- a/trace/simple.c
+++ b/trace/simple.c
@@ -218,6 +218,7 @@ int trace_record_start(TraceBufferRecord *rec, TraceEv
 {
     unsigned int idx, rec_off, old_idx, new_idx;
     uint32_t rec_len = sizeof(TraceRecord) + datasize;
+    uint64_t event_u64 = event;
     uint64_t timestamp_ns = get_clock();
 
     do {
@@ -235,7 +236,7 @@ int trace_record_start(TraceBufferRecord *rec, TraceEv
     idx = old_idx % TRACE_BUF_LEN;
 
     rec_off = idx;
-    rec_off = write_to_buffer(rec_off, &event, sizeof(event));
+    rec_off = write_to_buffer(rec_off, &event_u64, sizeof(event_u64));
     rec_off = write_to_buffer(rec_off, &timestamp_ns, sizeof(timestamp_ns
     rec_off = write_to_buffer(rec_off, &rec_len, sizeof(rec_len));