diff --git a/include/Makefile.am b/include/Makefile.am
index 13e17a26..1dfc0df5 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -31,6 +31,8 @@
 #
 #------------------------------------------------------------------------------
 
-include_HEADERS = ecrt.h
+include_HEADERS = \
+	ecrt.h \
+	ectty.h
 
 #------------------------------------------------------------------------------