diff --git a/NEWS b/NEWS
index 11484947a..571b2cbb6 100644
--- a/NEWS
+++ b/NEWS
@@ -48,11 +48,13 @@ ver 0.20 (not yet released)
 * update
   - apply .mpdignore matches to subdirectories
 
-ver 0.19.13 (not yet released)
+ver 0.19.13 (2016/02/23)
 * tags
   - aiff, riff: fix ID3 chunk padding
 * decoder
   - ffmpeg: support the TAK codec
+* fix disappearing duration of remote songs during playback
+* initialize supplementary groups with glibc 2.19+
 
 ver 0.19.12 (2015/12/15)
 * fix assertion failure on malformed UTF-8 tag
diff --git a/configure.ac b/configure.ac
index 05ff3ad50..ab98b19f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -229,6 +229,7 @@ if test x$host_is_linux = xyes; then
 fi
 
 AC_CHECK_FUNCS(getpwnam_r getpwuid_r)
+AC_CHECK_FUNCS(initgroups)
 AC_CHECK_FUNCS(fnmatch)
 AC_CHECK_FUNCS(strndup)
 
diff --git a/src/DetachedSong.hxx b/src/DetachedSong.hxx
index 844283dcf..52ea19926 100644
--- a/src/DetachedSong.hxx
+++ b/src/DetachedSong.hxx
@@ -188,6 +188,14 @@ public:
 		tag = std::move(other.tag);
 	}
 
+	/**
+	 * Similar to the MoveTagFrom(), but move only the #TagItem
+	 * array.
+	 */
+	void MoveTagItemsFrom(DetachedSong &&other) {
+		tag.MoveItemsFrom(std::move(other.tag));
+	}
+
 	time_t GetLastModified() const {
 		return mtime;
 	}
diff --git a/src/queue/Playlist.cxx b/src/queue/Playlist.cxx
index 384a76a3b..9bc10610e 100644
--- a/src/queue/Playlist.cxx
+++ b/src/queue/Playlist.cxx
@@ -37,7 +37,7 @@ playlist::TagModified(DetachedSong &&song)
 
 	DetachedSong &current_song = queue.GetOrder(current);
 	if (song.IsSame(current_song))
-		current_song.MoveTagFrom(std::move(song));
+		current_song.MoveTagItemsFrom(std::move(song));
 
 	queue.ModifyAtOrder(current);
 	queue.IncrementVersion();
diff --git a/src/tag/Tag.hxx b/src/tag/Tag.hxx
index aca2bf6a0..200064b79 100644
--- a/src/tag/Tag.hxx
+++ b/src/tag/Tag.hxx
@@ -80,9 +80,17 @@ struct Tag {
 	Tag &operator=(Tag &&other) {
 		duration = other.duration;
 		has_playlist = other.has_playlist;
+		MoveItemsFrom(std::move(other));
+		return *this;
+	}
+
+	/**
+	 * Similar to the move operator, but move only the #TagItem
+	 * array.
+	 */
+	void MoveItemsFrom(Tag &&other) {
 		std::swap(items, other.items);
 		std::swap(num_items, other.num_items);
-		return *this;
 	}
 
 	/**
diff --git a/src/unix/Daemon.cxx b/src/unix/Daemon.cxx
index 9aa16a078..4c31c5b8d 100644
--- a/src/unix/Daemon.cxx
+++ b/src/unix/Daemon.cxx
@@ -103,7 +103,7 @@ daemonize_set_user(void)
 				       (int)user_gid);
 	}
 
-#ifdef _BSD_SOURCE
+#ifdef HAVE_INITGROUPS
 	/* init supplementary groups
 	 * (must be done before we change our uid)
 	 */