diff --git a/patacrep/content/song.py b/patacrep/content/song.py
index 85a175e8..a9123244 100755
--- a/patacrep/content/song.py
+++ b/patacrep/content/song.py
@@ -61,7 +61,10 @@ def parse(keyword, argument, contentlist, config):
         contentlist = [
                 files.relpath(filename, songdir)
                 for filename
-                in files.recursive_find(songdir, "*.sg")
+                in (
+                    files.recursive_find(songdir, "*.sg")
+                    + files.recursive_find(songdir, "*.is")
+                    )
                 ]
     for elem in contentlist:
         before = len(songlist)
diff --git a/patacrep/data/latex/patacrep.sty b/patacrep/data/latex/patacrep.sty
index 084e5866..a0919772 100644
--- a/patacrep/data/latex/patacrep.sty
+++ b/patacrep/data/latex/patacrep.sty
@@ -415,4 +415,15 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Intersong management : discard command \sortassong
+\newcommand{\sortassong}[2][]{%
+    \@ifnextchar[%
+        \@void%
+        {}%
+}
+\def\@void[#1]{}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
 \endinput
diff --git a/patacrep/plastex.py b/patacrep/plastex.py
index 6ffab971..c4c81e62 100644
--- a/patacrep/plastex.py
+++ b/patacrep/plastex.py
@@ -106,7 +106,7 @@ def parsetex(filename):
     for node in doc.allChildNodes:
         if node.nodeName == "selectlanguage":
             data["languages"].add(node.attributes['lang'])
-        if node.nodeName == "beginsong":
+        if node.nodeName in ["beginsong", "sortassong"]:
             data["titles"] = node.attributes["titles"]
             data["args"] = node.attributes["args"]
 
diff --git a/patacrep/plastex_songs.py b/patacrep/plastex_songs.py
index 37536ef6..43c31986 100755
--- a/patacrep/plastex_songs.py
+++ b/patacrep/plastex_songs.py
@@ -61,3 +61,7 @@ class beginsong(plasTeX.Command): # pylint: disable=invalid-name,too-many-public
             else:
                 args[key] = unicode(val)
         self.attributes['args'] = args
+
+class sortassong(beginsong): # pylint: disable=invalid-name,too-many-public-methods
+    r"""Treat '\sortassong' exactly as if it were a '\beginsong'."""
+    pass