diff --git a/openbsc/Makefile.am b/openbsc/Makefile.am
index b2522ca..b966e69 100644
--- a/openbsc/Makefile.am
+++ b/openbsc/Makefile.am
@@ -1,7 +1,7 @@
 AUTOMAKE_OPTIONS = foreign dist-bzip2 1.6
 
 INCLUDES = $(all_includes) -I$(top_srcdir)/include
-SUBDIRS = include src tests
+SUBDIRS = doc include src tests
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = openbsc.pc