diff --git a/openbsc/src/libiu/Makefile.am b/openbsc/src/libiu/Makefile.am
index 7b1ba4d..1968d3e 100644
--- a/openbsc/src/libiu/Makefile.am
+++ b/openbsc/src/libiu/Makefile.am
@@ -6,5 +6,5 @@
 
 noinst_LIBRARIES = libiu.a
 
-libiu_a_SOURCES = iu.c
+libiu_a_SOURCES = iu.c iu_vty.c