diff --git a/lib/45/Makefile.am b/lib/45/Makefile.am
index 1fe6593b5..999b8310f 100644
--- a/lib/45/Makefile.am
+++ b/lib/45/Makefile.am
@@ -8,4 +8,4 @@ EXTRA_LIBRARIES = lib45.a
 
 INCLUDES = $(INCLUDE_krb4)
 
-lib45_a_SOURCES = get_ad_tkt.c
+lib45_a_SOURCES = get_ad_tkt.c mk_req.c