diff --git a/crates/layout/src/fields.rs b/crates/layout/src/fields.rs
index d4946c2f1..2b56405a9 100644
--- a/crates/layout/src/fields.rs
+++ b/crates/layout/src/fields.rs
@@ -63,8 +63,8 @@ impl FieldCtx {
         self.page_from.iter().rev().find(|(from, _)| *from <= off).map_or(self.page, |(_, page)| *page)
     }
     /// A key for caches: the parts of the context a page-dependent paragraph depends on.
-    pub fn page_key(&self) -> (u32, u32, u32, u32, u64) {
-        (self.page, self.pages, self.section_pages, self.section, self.bookmarks_key)
+    pub fn page_key(&self) -> (u32, u32, u32, u32, u64, NumFormat) {
+        (self.page, self.pages, self.section_pages, self.section, self.bookmarks_key, self.page_format)
     }
     /// A key for caches of paragraph `p` with STYLEREF fields (0 when they show their stored
     /// result): a hash of the results its STYLEREF fields have on this page, so an edit to body
diff --git a/crates/layout/src/lib.rs b/crates/layout/src/lib.rs
index 62724bd8b..1bc00495a 100644
--- a/crates/layout/src/lib.rs
+++ b/crates/layout/src/lib.rs
@@ -503,7 +503,7 @@ struct Key {
     rev: u64,
     width: u32,
     label: Option<String>,
-    page: Option<(u32, u32, u32, u32, u64)>,
+    page: Option<(u32, u32, u32, u32, u64, wordcraft_doc::section::NumFormat)>,
     /// The pages a split paragraph's fields are on after its first (`FieldCtx::page_from`).
     page_from: u64,
     table: u64,
diff --git a/crates/layout/src/tests_pages.rs b/crates/layout/src/tests_pages.rs
index b577d1a5a..cda6e1a96 100644
--- a/crates/layout/src/tests_pages.rs
+++ b/crates/layout/src/tests_pages.rs
@@ -530,3 +530,41 @@ fn footer_border_limits_body() {
         assert!(page.body.bottom() <= top + 0.01, "body {}, footer stroke {top}", page.body.bottom());
     }
 }
+
+/// A section numbering its pages in lower-case roman shows them so in its footer when the body
+/// shows the page count (`NUMPAGES`): the footer laid out while paginating, before the section's
+/// number format is known, isn't taken for the page's own footer.
+#[test]
+fn a_roman_page_number_in_the_footer_stays_roman_with_the_page_count_in_the_body() {
+    let field = |instr: &str| InlineObject::Field {
+        instr: instr.into(),
+        result: String::new(),
+        locked: false,
+        dirty: false,
+        code: false,
+        form: String::new(),
+    };
+    let mut d = Document::new();
+    let mut fp = Paragraph::new();
+    fp.insert_object(0, field("PAGE"), &Default::default()).unwrap();
+    let id = d.add_part(PartKind::Footer, vec![para_block(fp)]);
+    d.last_section.footers.default = Some(id);
+    let mut np = Paragraph::with_text(" pages", Default::default());
+    np.insert_object(0, field("NUMPAGES"), &Default::default()).unwrap();
+    d.body = vec![para_block(np)];
+    d.body.extend(paras(&"word ".repeat(40), 40));
+    let mut end = Paragraph::with_text("end", Default::default());
+    end.section = Some(Box::new(d.last_section.clone()));
+    d.body.push(para_block(end));
+    d.body.extend(paras(&"word ".repeat(40), 120));
+    d.last_section.page_num_start = Some(1);
+    d.last_section.page_num_format = wordcraft_doc::section::NumFormat::LowerRoman;
+    let l = lay(&d);
+    let roman: Vec<_> = l.pages.iter().filter(|p| p.section == 1).collect();
+    assert!(roman.len() > 5);
+    for p in roman {
+        let glyphs: usize = p.footer.iter().map(|it| if let Placed::Lines { para, .. } = it { para.glyphs.len() } else { 0 }).sum();
+        let want = wordcraft_doc::section::NumFormat::LowerRoman.format(p.number);
+        assert_eq!(glyphs, want.chars().count(), "page {}: the footer should show {want}", p.number);
+    }
+}