diff --git a/crypto/openssh/digest-libc.c b/crypto/openssh/digest-libc.c
index 1804b069840b..9377c774c551 100644
--- a/crypto/openssh/digest-libc.c
+++ b/crypto/openssh/digest-libc.c
@@ -147,7 +147,7 @@ ssh_digest_start(int alg)
 	const struct ssh_digest *digest = ssh_digest_by_alg(alg);
 	struct ssh_digest_ctx *ret;
 
-	if (digest == NULL || (ret = calloc(1, sizeof(ret))) == NULL)
+	if (digest == NULL || (ret = calloc(1, sizeof(*ret))) == NULL)
 		return NULL;
 	if ((ret->mdctx = calloc(1, digest->ctx_len)) == NULL) {
 		free(ret);