diff --git a/terminatorlib/terminatorterm.py b/terminatorlib/terminatorterm.py
index 6791b448..c7987bdf 100755
--- a/terminatorlib/terminatorterm.py
+++ b/terminatorlib/terminatorterm.py
@@ -1664,8 +1664,7 @@ text/plain
     allname = _("All")
     self.add_group(allname)
     for term in self.terminator.term_list:
-      if term._group is None:
-        term.set_group (None, allname)
+      term.set_group (None, allname)
     self.terminator.group_hoover ()
 
   def ungroup_all (self, widget):