diff --git a/crates/functions/src/lib.rs b/crates/functions/src/lib.rs
index 1b422b947..ab50fe62f 100644
--- a/crates/functions/src/lib.rs
+++ b/crates/functions/src/lib.rs
@@ -310,6 +310,10 @@ mod tests {
         assert_eq!(ev("REGEXREPLACE", vec![t("a1b2"), t("[0-9]"), t("#"), n(2.0)]), Value::text("a1b#"));
         assert_eq!(ev("REGEXREPLACE", vec![t("a1b2"), t("[0-9]"), t("#"), n(-2.0)]), Value::text("a#b2"));
         assert_eq!(ev("REGEXREPLACE", vec![t("a1b2"), t("[0-9]"), t("#"), n(-3.0)]), Value::text("a1b2"));
+        // 2^32 is no occurrence the text has (and on 32-bit targets it must not wrap to 0).
+        for occurrence in [4_294_967_296.0, -4_294_967_296.0] {
+            assert_eq!(ev("REGEXREPLACE", vec![t("a1b2"), t("[0-9]"), t("#"), n(occurrence)]), Value::text("a1b2"));
+        }
         // One match whose replacement repeats it 10,000 times: refused before it is built.
         assert_eq!(ev("REGEXREPLACE", vec![t(&many), t("^.*$"), t(&"$0".repeat(10_000))]), Value::Error(CellError::Value));
         assert_eq!(ev("REGEXREPLACE", vec![t(&many), t("^.*$"), t(&"$0".repeat(10_000)), n(1.0)]), Value::Error(CellError::Value));
diff --git a/crates/functions/src/text.rs b/crates/functions/src/text.rs
index 87ee86cbb..4d40828ae 100644
--- a/crates/functions/src/text.rs
+++ b/crates/functions/src/text.rs
@@ -883,7 +883,8 @@ fn regexreplace(a: &[Arg], _c: &mut dyn Ctx) -> R<Value> {
         out.push_str(s.get(last..).unwrap_or_default());
         return check_len(out);
     }
-    let k = occ.unsigned_abs() as usize;
+    // An occurrence past what `usize` holds (32-bit targets) names no match: the text is returned as it was.
+    let Ok(k) = usize::try_from(occ.unsigned_abs()) else { return text_val(s) };
     // Keeps only the wanted match's captures: the nth from the front, or a window of the last `k`.
     let cap = if occ > 0 {
         re.captures_iter(&s).nth(k - 1)