diff --git a/libc-test/build.rs b/libc-test/build.rs
index e35dcb4eb197d876d72e60ac9e59a63a6200b794..d828b9fe3d7a4e89c03634699b231d19d271d09c 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -1370,8 +1370,8 @@ fn test_android(target: &str) {
 
             // FIXME: still necessary?
             "SIG_DFL" | "SIG_ERR" | "SIG_IGN" => true, // sighandler_t weirdness
-            // FIXME: still necessary?
-            "SIGUNUSED" => true, // removed in glibc 2.26
+            // FIXME: deprecated - removed in glibc 2.26
+            "SIGUNUSED" => true,
 
             _ => false,
         }