diff --git a/src/ssl_sock.c b/src/ssl_sock.c
index 63178b8..8e5d1a2 100644
--- a/src/ssl_sock.c
+++ b/src/ssl_sock.c
@@ -6805,6 +6805,7 @@
 	X509 *crt = NULL;
 	const EVP_MD *digest;
 	int ret = 0;
+	unsigned int len = 0;
 	struct buffer *smp_trash;
 	struct connection *conn;
 	struct ssl_sock_ctx *ctx;
@@ -6828,9 +6829,8 @@
 
 	smp_trash = get_trash_chunk();
 	digest = EVP_sha1();
-	X509_digest(crt, digest, (unsigned char *) smp_trash->area,
-		    (unsigned int *)&smp_trash->data);
-
+	X509_digest(crt, digest, (unsigned char *) smp_trash->area, &len);
+	smp_trash->data = len;
 	smp->data.u.str = *smp_trash;
 	smp->data.type = SMP_T_BIN;
 	ret = 1;
@@ -7356,6 +7356,7 @@
 {
 	struct connection *conn;
 	struct ssl_sock_ctx *ctx;
+	unsigned int len = 0;
 
 	smp->flags = SMP_F_CONST;
 	smp->data.type = SMP_T_STR;
@@ -7368,12 +7369,13 @@
 
 	smp->data.u.str.area = NULL;
 	SSL_get0_next_proto_negotiated(ctx->ssl,
-	                                (const unsigned char **)&smp->data.u.str.area,
-	                                (unsigned *)&smp->data.u.str.data);
+	                               (const unsigned char **)&smp->data.u.str.area,
+	                               &len);
 
 	if (!smp->data.u.str.area)
 		return 0;
 
+	smp->data.u.str.data = len;
 	return 1;
 }
 #endif
@@ -7384,6 +7386,7 @@
 {
 	struct connection *conn;
 	struct ssl_sock_ctx *ctx;
+	unsigned int len = 0;
 
 	smp->flags = SMP_F_CONST;
 	smp->data.type = SMP_T_STR;
@@ -7397,12 +7400,13 @@
 
 	smp->data.u.str.area = NULL;
 	SSL_get0_alpn_selected(ctx->ssl,
-	                         (const unsigned char **)&smp->data.u.str.area,
-	                         (unsigned *)&smp->data.u.str.data);
+	                       (const unsigned char **)&smp->data.u.str.area,
+	                       &len);
 
 	if (!smp->data.u.str.area)
 		return 0;
 
+	smp->data.u.str.data = len;
 	return 1;
 }
 #endif
@@ -7446,6 +7450,7 @@
 	                                    smp->strm ? cs_conn(objt_cs(smp->strm->si[1].end)) : NULL;
 	SSL_SESSION *ssl_sess;
 	struct ssl_sock_ctx *ctx;
+	unsigned int len = 0;
 
 	smp->flags = SMP_F_CONST;
 	smp->data.type = SMP_T_BIN;
@@ -7458,11 +7463,11 @@
 	if (!ssl_sess)
 		return 0;
 
-	smp->data.u.str.area = (char *)SSL_SESSION_get_id(ssl_sess,
-							  (unsigned int *)&smp->data.u.str.data);
+	smp->data.u.str.area = (char *)SSL_SESSION_get_id(ssl_sess, &len);
 	if (!smp->data.u.str.area || !smp->data.u.str.data)
 		return 0;
 
+	smp->data.u.str.data = len;
 	return 1;
 }
 #endif