diff --git a/server-window.c b/server-window.c
index 1b3938d3..c96c2602 100644
--- a/server-window.c
+++ b/server-window.c
@@ -147,7 +147,7 @@ server_window_check_silence(struct session *s, struct winlink *wl)
 		 * from this window.
 		 */
 		if (gettimeofday(&w->silence_timer, NULL) != 0)
-			fatal("gettimeofday failed.");
+			fatal("gettimeofday failed");
 
 		return (0);
 	}
diff --git a/window.c b/window.c
index 395574f7..77c7a633 100644
--- a/window.c
+++ b/window.c
@@ -934,7 +934,7 @@ window_pane_read_callback(unused struct bufferevent *bufev, void *data)
 	 */
 	wp->window->flags |= WINDOW_SILENCE;
 	if (gettimeofday(&wp->window->silence_timer, NULL) != 0)
-		fatal("gettimeofday failed.");
+		fatal("gettimeofday failed");
 	return;
 
 start_timer: