switch to libreoffice
diff --git a/configure.ac b/configure.ac
index be943e8..ce11cf0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3112,7 +3112,7 @@
 BlenderDecodeDelegateDefault='blender'
 BrowseDelegateDefault='xdg-open'
 DNGDecodeDelegateDefault='ufraw-batch'
-DOCDecodeDelegateDefault='soffice'
+DOCDecodeDelegateDefault='libreoffice'
 GVCDecodeDelegateDefault='dot'
 DVIDecodeDelegateDefault='dvips'
 EditorDelegateDefault='xterm'