diff --git a/src/c/unixint.d b/src/c/unixint.d
index 77785529d..7b08e70e4 100644
--- a/src/c/unixint.d
+++ b/src/c/unixint.d
@@ -560,8 +560,9 @@ handler_fn_protype(process_interrupt_handler, int sig, siginfo_t *siginfo, void
                 return;
 	signal_object = pop_signal(the_env);
         errno = old_errno;
-	if (signal_object != Cnil)
+	if (signal_object != Cnil) {
 		handle_or_queue(the_env, signal_object, sig);
+	}
 }
 #endif
 
@@ -870,6 +871,8 @@ ecl_interrupt_process(cl_object process, cl_object function)
          * - In POSIX systems it sends a user level interrupt to
          *   the thread, which then decides how to act.
          */
+	/* If FUNCTION is NIL, we just intend to wake up the
+	 * process from some call to ecl_musleep() */
 	if (!Null(function)) {
 		/* Trivial spinlock to ensure that the process is past
 		 * the section where it establishes a CATCH */
@@ -878,8 +881,6 @@ ecl_interrupt_process(cl_object process, cl_object function)
 		/* And then only care when the process is really active, for
 		 * otherwise the signal will be ignored. */
 		if (process->process.phase == ECL_PROCESS_ACTIVE) {
-			/* If FUNCTION is NIL, we just intend to wake up the
-			 * process from some call to ecl_musleep() */
 			function = si_coerce_to_function(function);
 			queue_signal(process->process.env, function);
 		}