diff --git a/src/perfetto_cmd/perfetto_cmd.cc b/src/perfetto_cmd/perfetto_cmd.cc
index 9614642..ebdd740 100644
--- a/src/perfetto_cmd/perfetto_cmd.cc
+++ b/src/perfetto_cmd/perfetto_cmd.cc
@@ -356,7 +356,7 @@
     // If we are tracing to DropBox, there's no need to make a
     // filesystem-visible temporary file.
     // TODO(skyostil): Fall back to base::TempFile for older devices.
-    fd.reset(open(kTempDropBoxTraceDir, O_TMPFILE | O_RDWR, 0600));
+    fd.reset(open(kTempDropBoxTraceDir, O_CREAT | O_TMPFILE | O_RDWR, 0600));
     if (!fd) {
       PERFETTO_ELOG("Could not create a temporary trace file in %s",
                     kTempDropBoxTraceDir);