diff --git a/tests/Makefile.am b/tests/Makefile.am
index 95d836b..9b4cfe4 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,5 +1,6 @@
 SUBDIRS = \
 	bsc \
+	codec_pref \
 	gsm0408 \
 	abis \
 	subscr \