diff --git a/GNUmakefile.am b/GNUmakefile.am
index 27767e8..e008c6d 100644
--- a/GNUmakefile.am
+++ b/GNUmakefile.am
@@ -8,6 +8,7 @@ LDADD = \
 	libcan.la
 
 noinst_HEADERS = \
+	canframelen.h \
 	lib.h \
 	terminal.h \
 	include/linux/can/bcm.h \