diff --git a/Makefile.am b/Makefile.am
index f35fbd9af..1ef40eae4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,6 +7,7 @@ bin_SCRIPTS = gphoto2-config
 
 EXTRA_DIST = HACKING MAINTAINERS makefile.os2 os2mak.inc TESTERS CHANGES
 
+# Note: @subdirs@ lists all the directories from AC_CONFIG_SUBDIRS()
 SUBDIRS = @subdirs@ libgphoto2 camlibs tests po packaging doc
 
 doc_DATA = AUTHORS COPYING README CHANGES NEWS
diff --git a/libgphoto2_port/Makefile.am b/libgphoto2_port/Makefile.am
index 183606880..a867e73e8 100644
--- a/libgphoto2_port/Makefile.am
+++ b/libgphoto2_port/Makefile.am
@@ -7,6 +7,7 @@ VERSION_FLAGS = -DLIBGPPORT_VERSION=\"@LIBGPPORT_VERSION@\" -DHAVE_TERMIOS_H
 ## Executable files
 bin_SCRIPTS = gphoto2-port-config
 
+# Note: @subdirs@ lists all the directories from AC_CONFIG_SUBDIRS()
 SUBDIRS = po @subdirs@ libgphoto2_port test @IOLIB_SUBDIRS@ doc m4
 
 EXTRA_DIST =   		\