diff --git a/jack/jack.h b/jack/jack.h
index 15c011d..f90699e 100644
--- a/jack/jack.h
+++ b/jack/jack.h
@@ -166,10 +166,10 @@ void jack_on_shutdown (jack_client_t *client,
  * work be done, passing @a arg as the second argument.
  *
  * The code in the supplied function must be suitable for real-time
- * execution.  That means that it cannot call functions that might
- * block for a long time.  This includes malloc, free, printf,
+ * execution. That means that it cannot call functions that might
+ * block for a long time. This includes malloc, free, printf,
  * pthread_mutex_lock, sleep, wait, poll, select, pthread_join,
- * pthread_cond_wait, etc, etc.  See
+ * pthread_cond_wait, etc, etc. See
  * http://jackit.sourceforge.net/docs/design/design.html#SECTION00411000000000000000
  * for more information.
  *
@@ -209,10 +209,10 @@ void jack_cycle_signal (jack_client_t* client, int status);
  * Tell the Jack server to call @a thread_callback in the RT thread.
  * Typical use are in conjunction with @a jack_cycle_wait and @ jack_cycle_signal functions.
  * The code in the supplied function must be suitable for real-time
- * execution.  That means that it cannot call functions that might
- * block for a long time.  This includes malloc, free, printf,
+ * execution. That means that it cannot call functions that might
+ * block for a long time. This includes malloc, free, printf,
  * pthread_mutex_lock, sleep, wait, poll, select, pthread_join,
- * pthread_cond_wait, etc, etc.  See
+ * pthread_cond_wait, etc, etc. See
  * http://jackit.sourceforge.net/docs/design/design.html#SECTION00411000000000000000
  * for more information.
  *