diff --git a/lib/hcrypto/Makefile.am b/lib/hcrypto/Makefile.am
index 1c5d9dcad..cd6ea3251 100644
--- a/lib/hcrypto/Makefile.am
+++ b/lib/hcrypto/Makefile.am
@@ -154,6 +154,7 @@ libhcrypto_la_SOURCES =	\
 	sha.c		\
 	sha.h		\
 	sha256.c	\
+	validate.c	\
 	ui.c		\
 	ui.h