Fix minor typo.
diff --git a/src/deps_log.h b/src/deps_log.h
index b1aa361..3812a28 100644
--- a/src/deps_log.h
+++ b/src/deps_log.h
@@ -58,7 +58,7 @@
/// concurrent writes of multiple ninja processes to the log).
/// dependency records are an array of 4-byte integers
/// [output path id,
-/// output path mtime (lower 4 bytes), output path mtime (upper 8 bytes),
+/// output path mtime (lower 4 bytes), output path mtime (upper 4 bytes),
/// input path id, input path id...]
/// (The mtime is compared against the on-disk output path mtime
/// to verify the stored data is up-to-date.)
