diff --git a/terminal.c b/terminal.c
index f35d38d3..10a85841 100644
--- a/terminal.c
+++ b/terminal.c
@@ -2028,6 +2028,8 @@ bool
 term_alpha_reset(struct terminal *term)
 {
     term->colors.alpha = term->conf->colors.alpha;
+    term->render.last_buf = NULL;
+    render_refresh(term);
     return true;
 }