diff --git a/src/tls/openssl/sni.c b/src/tls/openssl/sni.c
index c142fd87d..43cd8ad2d 100644
--- a/src/tls/openssl/sni.c
+++ b/src/tls/openssl/sni.c
@@ -8,6 +8,7 @@
 #include <openssl/err.h>
 #include <openssl/ssl.h>
 #include <openssl/x509.h>
+#include <openssl/x509v3.h>
 #include <re_types.h>
 #include <re_fmt.h>
 #include <re_mem.h>