diff --git a/kdc/Makefile.am b/kdc/Makefile.am
index b43c1735a..dd71cd828 100644
--- a/kdc/Makefile.am
+++ b/kdc/Makefile.am
@@ -20,9 +20,9 @@ kstash_SOURCES = kstash.c headers.h
 string2key_SOURCES = string2key.c headers.h
 
 if KRB4
-krb4_sources = 	524.c kerberos4.c kaserver.c rx.h
+krb4_sources = kaserver.c rx.h
 else
-krb4_sources = 
+krb4_sources =
 endif
 
 kdc_SOURCES = \
@@ -33,6 +33,8 @@ kdc_SOURCES = \
 	log.c		\
 	main.c		\
 	misc.c		\
+	524.c		\
+	kerberos4.c	\
 	$(krb4_sources)