diff --git a/libs/ardour/audio_diskstream.cc b/libs/ardour/audio_diskstream.cc
index b9ce987c87..35153b7fde 100644
--- a/libs/ardour/audio_diskstream.cc
+++ b/libs/ardour/audio_diskstream.cc
@@ -925,7 +925,7 @@ AudioDiskstream::internal_playback_seek (framecnt_t distance)
 	boost::shared_ptr<ChannelList> c = channels.reader();
 
 	for (chan = c->begin(); chan != c->end(); ++chan) {
-		(*chan)->playback_buf->increment_read_ptr (llabs(distance));
+		(*chan)->playback_buf->increment_read_ptr (std::llabs(distance));
 	}
 
 	if (first_recordable_frame < max_framepos) {
diff --git a/libs/ardour/audio_track.cc b/libs/ardour/audio_track.cc
index 0530dbfce9..2e697a95cc 100644
--- a/libs/ardour/audio_track.cc
+++ b/libs/ardour/audio_track.cc
@@ -315,7 +315,7 @@ AudioTrack::roll (pframes_t nframes, framepos_t start_frame, framepos_t end_fram
 	if (!lm.locked()) {
 		boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 		framecnt_t playback_distance = diskstream->calculate_playback_distance(nframes);
-		if (can_internal_playback_seek(llabs(playback_distance))) {
+		if (can_internal_playback_seek(std::llabs(playback_distance))) {
 			/* TODO should declick */
 			internal_playback_seek(playback_distance);
 		}
diff --git a/libs/ardour/midi_track.cc b/libs/ardour/midi_track.cc
index f88c331c2c..7dff7ac639 100644
--- a/libs/ardour/midi_track.cc
+++ b/libs/ardour/midi_track.cc
@@ -321,7 +321,7 @@ MidiTrack::roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame
 	if (!lm.locked()) {
 		boost::shared_ptr<MidiDiskstream> diskstream = midi_diskstream();
 		framecnt_t playback_distance = diskstream->calculate_playback_distance(nframes);
-		if (can_internal_playback_seek(llabs(playback_distance))) {
+		if (can_internal_playback_seek(std::llabs(playback_distance))) {
 			/* TODO should declick, and/or note-off */
 			internal_playback_seek(playback_distance);
 		}