diff --git a/docs/Makefile.am b/docs/Makefile.am
index 5fd3fc1..4162977 100644
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -39,4 +39,4 @@ HTML_IMAGES =
 include $(top_srcdir)/gtk-doc.make
 
 # Other files to distribute
-EXTRA_DIST += version.xml.in
+EXTRA_DIST = version.xml.in