diff --git a/format.c b/format.c
index f771c85f..3bbb8cf1 100644
--- a/format.c
+++ b/format.c
@@ -468,6 +468,8 @@ format_cb_pane_tabs(struct format_tree *ft, struct format_entry *fe)
 		return;
 
 	buffer = evbuffer_new();
+	if (buffer == NULL)
+		fatalx("out of memory");
 	for (i = 0; i < wp->base.grid->sx; i++) {
 		if (!bit_test(wp->base.tabs, i))
 			continue;
diff --git a/input.c b/input.c
index 18c8eb9a..8a66d89e 100644
--- a/input.c
+++ b/input.c
@@ -766,6 +766,8 @@ input_init(struct window_pane *wp)
 	ictx->input_buf = xmalloc(INPUT_BUF_START);
 
 	ictx->since_ground = evbuffer_new();
+	if (ictx->since_ground == NULL)
+		fatalx("out of memory");
 
 	input_reset(wp, 0);
 }
diff --git a/server-client.c b/server-client.c
index 21cccc85..e8614d40 100644
--- a/server-client.c
+++ b/server-client.c
@@ -121,8 +121,14 @@ server_client_create(int fd)
 	c->cmdq->client_exit = 1;
 
 	c->stdin_data = evbuffer_new();
+	if (c->stdin_data == NULL)
+		fatalx("out of memory");
 	c->stdout_data = evbuffer_new();
+	if (c->stdout_data == NULL)
+		fatalx("out of memory");
 	c->stderr_data = evbuffer_new();
+	if (c->stderr_data == NULL)
+		fatalx("out of memory");
 
 	c->tty.fd = -1;
 	c->title = NULL;
diff --git a/window.c b/window.c
index 45ec7790..9d95bb77 100644
--- a/window.c
+++ b/window.c
@@ -945,6 +945,8 @@ window_pane_spawn(struct window_pane *wp, int argc, char **argv,
 
 	wp->event = bufferevent_new(wp->fd, window_pane_read_callback, NULL,
 	    window_pane_error_callback, wp);
+	if (wp->event == NULL)
+		fatalx("out of memory");
 
 	bufferevent_setwatermark(wp->event, EV_READ, 0, READ_SIZE);
 	bufferevent_enable(wp->event, EV_READ|EV_WRITE);