diff --git a/include/pcm.h b/include/pcm.h
index 838fe3f5..e86662d5 100644
--- a/include/pcm.h
+++ b/include/pcm.h
@@ -318,6 +318,8 @@ enum _snd_pcm_type {
 	SND_PCM_TYPE_DROUTE,
 	/** Loopback server plugin (not yet implemented) */
 	SND_PCM_TYPE_LBSERVER,
+	/** Linear <-> float format conversion PCM */
+	SND_PCM_TYPE_LINEAR_FLOAT,
 	/** LADSPA integration plugin */
 	SND_PCM_TYPE_LADSPA,
 };