diff --git a/src/common/tortls.c b/src/common/tortls.c
index 288b757b04662e49ade36ff8bbe0eb8975b1b881..9847bc960af86d189f51da968a7375e1da4052b6 100644
--- a/src/common/tortls.c
+++ b/src/common/tortls.c
@@ -67,7 +67,7 @@ typedef struct tor_tls_context_t {
  */
 struct tor_tls_t {
   HT_ENTRY(tor_tls_t) node;
-  tor_tls_context_t *context; /** A link to the context object for this tls */
+  tor_tls_context_t *context; /** A link to the context object for this tls. */
   SSL *ssl; /**< An OpenSSL SSL object. */
   int socket; /**< The underlying file descriptor for this TLS connection. */
   char *address; /**< An address to log when describing this connectinon. */