diff --git a/lib/erl/Makefile.am b/lib/erl/Makefile.am
index 33761a1..18028a7 100644
--- a/lib/erl/Makefile.am
+++ b/lib/erl/Makefile.am
@@ -41,4 +41,6 @@
 maintainer-clean-local:
 	rm -rf ebin
 
+EXTRA_DIST = include src
+
 MAINTAINERCLEANFILES = Makefile.in