1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib/libcrypto/dsa/dsa_vrf.c b/src/lib/libcrypto/dsa/dsa_vrf.c
index c4aeddd056..066c6b5b28 100644
--- a/src/lib/libcrypto/dsa/dsa_vrf.c
+++ b/src/lib/libcrypto/dsa/dsa_vrf.c
@@ -65,6 +65,7 @@
 #include <openssl/rand.h>
 #include <openssl/asn1.h>
 #include <openssl/asn1_mac.h>
+#include <openssl/engine.h>
 
 int DSA_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
                   DSA *dsa)