diff --git a/libc-test/build.rs b/libc-test/build.rs
index 977d444a463980c37a8788b49e090f773fd8c4c4..ea5494801db65d9dc92596017f6633435ef3deae 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -2230,7 +2230,7 @@ fn test_linux(target: &str) {
 
             t if t.ends_with("_t") => t.to_string(),
 
-            // This is either a struct or a typedef to a struct
+            // In MUSL `flock64` is a typedef to `flock`.
             "flock64" if musl => format!("struct {}", ty),
 
             // put `struct` in front of all structs:.