diff --git a/include/trace/events/asoc.h b/include/trace/events/asoc.h
index 4eed9028bb11..517015ef36a8 100644
--- a/include/trace/events/asoc.h
+++ b/include/trace/events/asoc.h
@@ -12,6 +12,8 @@
 #define DAPM_DIRECT "(direct)"
 #define DAPM_ARROW(dir) (((dir) == SND_SOC_DAPM_DIR_OUT) ? "->" : "<-")
 
+TRACE_DEFINE_ENUM(SND_SOC_DAPM_DIR_OUT);
+
 struct snd_soc_jack;
 struct snd_soc_card;
 struct snd_soc_dapm_widget;