diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0331924..5a64cd50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,7 +36,7 @@
   (https://codeberg.org/dnkl/foot/issues/244).
 * Key/mouse binding `select-extend-character-wise`, which forces the
   selection mode to 'character-wise' when extending a selection.
-* `DECSET 1047` and `DECSET 1048`.
+* `DECSET` `47`, `1047` and `1048`.
 
 
 ### Changed
diff --git a/csi.c b/csi.c
index 8a4adb7e..9f246a33 100644
--- a/csi.c
+++ b/csi.c
@@ -496,6 +496,7 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
             term_restore_cursor(term, &term->grid->saved_cursor);
         break;
 
+    case 47:
     case 1047:
     case 1049:
         if (enable && term->grid != &term->alt) {
@@ -626,6 +627,7 @@ xtsave(struct terminal *term, unsigned param)
     case 12: term->xtsave.cursor_blink = term->cursor_blink.decset; break;
     case 25: term->xtsave.show_cursor = !term->hide_cursor; break;
     case 45: term->xtsave.reverse_wrap = term->reverse_wrap; break;
+    case 47: term->xtsave.alt_screen = term->grid == &term->alt; break;
     case 1000: term->xtsave.mouse_click = term->mouse_tracking == MOUSE_CLICK; break;
     case 1001: break;
     case 1002: term->xtsave.mouse_drag = term->mouse_tracking == MOUSE_DRAG; break;
@@ -663,6 +665,7 @@ xtrestore(struct terminal *term, unsigned param)
     case 12: enable = term->xtsave.cursor_blink; break;
     case 25: enable = term->xtsave.show_cursor; break;
     case 45: enable = term->xtsave.reverse_wrap; break;
+    case 47: enable = term->xtsave.alt_screen; break;
     case 1000: enable = term->xtsave.mouse_click; break;
     case 1001: return;
     case 1002: enable = term->xtsave.mouse_drag; break;