diff --git a/libc-test/build.rs b/libc-test/build.rs
index dab69ecf0351cf2e3ef74803e82a096a943dedda..c68fae6efa55f7b2878376a7f76c14e1bb7cc83f 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -350,10 +350,6 @@ fn main() {
             // they're implemented on rumprun yet, just let them slide for now.
             // Some of them look like they have headers but then don't have
             // corresponding actual definitions either...
-            "backtrace" |
-            "pthread_main_np" |
-            "pthread_set_name_np" |
-            "pthread_stackseg_np" |
             "shm_open" |
             "shm_unlink" |
             "syscall" |