diff --git a/Makefile.am b/Makefile.am
index 31a54ea..4a1f65d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -13,6 +13,7 @@
 	include \
 	src \
 	tests \
+	contrib \
 	$(NULL)
 
 pkgconfigdir = $(libdir)/pkgconfig