diff --git a/lib/des/Makefile.am b/lib/des/Makefile.am
index f9bac31ec..7b033def8 100644
--- a/lib/des/Makefile.am
+++ b/lib/des/Makefile.am
@@ -91,6 +91,7 @@ libhcrypto_la_SOURCES =	\
 	pkcs12.c	\
 	rand.c		\
 	rand.h		\
+	rand-unix.c	\
 	rc2.c		\
 	rc2.h		\
 	rc4.c		\