diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index a1d85dfad32..c32cf3d015f 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -1707,7 +1707,7 @@ pub(crate) fn parse_mir_include_spans(slot: &mut MirIncludeSpans, v: Option<&str
     check_cfg_all_expected: bool = (false, parse_bool, [UNTRACKED],
         "show all expected values in check-cfg diagnostics (default: no)"),
     checksum_hash_algorithm: Option<SourceFileHashAlgorithm> = (None, parse_cargo_src_file_hash, [TRACKED],
-        "hash algorithm of source files used to check freshness in cargo (`sha256`)"),
+        "hash algorithm of source files used to check freshness in cargo (`blake3` or `sha256`)"),
     codegen_backend: Option<String> = (None, parse_opt_string, [TRACKED],
         "the backend to use"),
     combine_cgu: bool = (false, parse_bool, [TRACKED],