diff --git a/include/sound/Makefile.am b/include/sound/Makefile.am
index e6c3eb0e..5250cf34 100644
--- a/include/sound/Makefile.am
+++ b/include/sound/Makefile.am
@@ -1,5 +1,6 @@
 alsasoundincludedir = ${includedir}/alsa/sound
 
-alsasoundinclude_HEADERS = ainstr_fm.h ainstr_gf1.h ainstr_simple.h ainstr_iw.h
+alsasoundinclude_HEADERS = ainstr_fm.h ainstr_gf1.h ainstr_simple.h ainstr_iw.h \
+			   hdsp.h sb16_csp.h sscape_ioctl.h
 
 noinst_HEADERS = asound.h asoundef.h asequencer.h