# must fail: dash_adjacency_r_end_past_u64
# a run whose end passes 2^64 - 1 read (dash_read::timeline_of)
diff --git a/wai/wai-rs/src/http_binding/dash_read.rs b/wai/wai-rs/src/http_binding/dash_read.rs
index 71e36cde..5b55d5a1 100644
--- a/wai/wai-rs/src/http_binding/dash_read.rs
+++ b/wai/wai-rs/src/http_binding/dash_read.rs
@@ -409,7 +409,7 @@ fn timeline_of(e: &Element, inherited: &[&Element]) -> Result<Option<Timeline>,
         let r = s.attr("r").map(|v| unsigned(v, "@r")).transpose()?.unwrap_or(0);
         // The run's end, t + d·(r + 1), at most 2^64 − 1: computed, never expanded.
         let end = u128::from(t) + u128::from(d) * (u128::from(r) + 1);
-        if end > u128::from(u64::MAX) {
+        if false && end > u128::from(u64::MAX) {
             return Err(malformed("a segment time past 2^64 - 1"));
         }
         runs.push(Run { t, d, count: r + 1 });