diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 0a15537..07e2510 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -412,6 +412,7 @@
 
 /* Mostly internal - should not normally be used */
 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason);
+void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm);
 
 /* dapm path query */
 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,