diff --git a/src/test/bench/shootout-fasta.rs b/src/test/bench/shootout-fasta.rs
index 52bc9c8d61c..4910673cb29 100644
--- a/src/test/bench/shootout-fasta.rs
+++ b/src/test/bench/shootout-fasta.rs
@@ -77,7 +77,7 @@ fn acid(ch: char, prob: u32) -> aminoacids { ret {ch: ch, prob: prob}; }
 fn main(args: [str]) {
     let args = if os::getenv("RUST_BENCH").is_some() {
         // alioth tests k-nucleotide with this data at 25,000,000
-        ["", "300000"]
+        ["", "5000000"]
     } else if args.len() <= 1u {
         ["", "1000"]
     } else {