diff --git a/us428control/Makefile.am b/us428control/Makefile.am
index 27b0285..e15f39a 100644
--- a/us428control/Makefile.am
+++ b/us428control/Makefile.am
@@ -4,6 +4,7 @@ AUTOMAKE_OPTIONS = 1.3 foreign
 bin_PROGRAMS = us428control
 
 us428control_SOURCES = us428control.cc Cus428State.cc Cus428_ctls.cc Cus428Midi.cc
+noinst_HEADERS = usbus428ctldefs.h Cus428State.h Cus428_ctls.h Cus428Midi.h
 
 EXTRA_DIST = depcomp