diff --git a/spice/enums.h b/spice/enums.h
index 3c89f2e..8c731e9 100644
--- a/spice/enums.h
+++ b/spice/enums.h
@@ -523,6 +523,7 @@ enum {
     SPICE_MSG_PLAYBACK_STOP,
     SPICE_MSG_PLAYBACK_VOLUME,
     SPICE_MSG_PLAYBACK_MUTE,
+    SPICE_MSG_PLAYBACK_LATENCY,
 
     SPICE_MSG_END_PLAYBACK
 };
diff --git a/spice/protocol.h b/spice/protocol.h
index 028cade..e11f384 100644
--- a/spice/protocol.h
+++ b/spice/protocol.h
@@ -110,6 +110,7 @@ typedef struct SPICE_ATTR_PACKED SpiceSubMessageList {
 enum {
     SPICE_PLAYBACK_CAP_CELT_0_5_1,
     SPICE_PLAYBACK_CAP_VOLUME,
+    SPICE_PLAYBACK_CAP_LATENCY,
 };
 
 enum {