diff --git a/doc/userguide/Makefile.am b/doc/userguide/Makefile.am
index 5fa4ade6f0..27a8a64998 100644
--- a/doc/userguide/Makefile.am
+++ b/doc/userguide/Makefile.am
@@ -1,4 +1,5 @@
 EXTRA_DIST = \
+	_static \
 	acknowledgements.rst \
 	capture-hardware \
 	command-line-options.rst \