--- a/src/input/Makefile.am
+++ b/src/input/Makefile.am
@@ -103,6 +103,7 @@
 xineplug_inp_net_la_SOURCES = input_net.c net_buf_ctrl.c
 xineplug_inp_net_la_LIBADD = $(XINE_LIB) $(NET_LIBS) $(PTHREAD_LIBS) $(LTLIBINTL)
 
+# note: compiling ../demuxers/asfheader.c here is safe given same compiler options
 xineplug_inp_mms_la_SOURCES = input_mms.c net_buf_ctrl.c mms.c mmsh.c http_helper.c ../demuxers/asfheader.c
 xineplug_inp_mms_la_LIBADD = $(XINE_LIB) $(LTLIBICONV) $(PTHREAD_LIBS) $(LTLIBINTL)