diff --git a/doc/reference/Makefile.am b/doc/reference/Makefile.am
index ef6bf98..9326a85 100644
--- a/doc/reference/Makefile.am
+++ b/doc/reference/Makefile.am
@@ -42,7 +42,7 @@
 # gtk-doc will search all .c and .h files beneath these paths
 # for inline comments documenting functions and macros.
 # e.g. DOC_SOURCE_DIR=$(top_srcdir)/gtk $(top_srcdir)/gdk
-DOC_SOURCE_DIR=$(top_srcdir)/lib
+DOC_SOURCE_DIR=$(top_srcdir)/lib $(top_builddir)/lib
 
 # Extra options to pass to gtkdoc-scangobj. Normally not needed.
 SCANGOBJ_OPTIONS=
@@ -65,7 +65,7 @@
 # Used for dependencies. The docs will be rebuilt if any of these change.
 # e.g. HFILE_GLOB=$(top_srcdir)/gtk/*.h
 # e.g. CFILE_GLOB=$(top_srcdir)/gtk/*.c
-HFILE_GLOB=$(top_srcdir)/lib/*.h
+HFILE_GLOB=$(top_srcdir)/lib/*.h $(top_builddir)/lib/includes/libtasn1.h
 CFILE_GLOB=$(top_srcdir)/lib/*.c
 
 # Extra header to include when scanning, which are not under DOC_SOURCE_DIR