diff --git a/sys/include/net/sock/dtls.h b/sys/include/net/sock/dtls.h
index 3a0b49e313..fa9a8d7061 100644
--- a/sys/include/net/sock/dtls.h
+++ b/sys/include/net/sock/dtls.h
@@ -557,7 +557,7 @@ void sock_dtls_init(void);
  *
  * @param[out] sock     The resulting DTLS sock object
  * @param[in] udp_sock  Existing UDP sock initialized with
- *                      @ref sock_udp_create()to be used underneath.
+ *                      @ref sock_udp_create() to be used underneath.
  * @param[in] tag       Credential tag of @p sock. The sock will only use
  *                      credentials with the same tag given here.
  * @param[in] version   [DTLS version](@ref sock_dtls_prot_version) to use.