diff --git a/libc/include/pthread.yaml b/libc/include/pthread.yaml
index 4f386bdd11cfd..5b27e68d2f2d8 100644
--- a/libc/include/pthread.yaml
+++ b/libc/include/pthread.yaml
@@ -402,7 +402,7 @@ functions:
   - name: pthread_setspecific
     standards:
       - POSIX
-    return_type: void *
+    return_type: int
     arguments:
       - type: pthread_key_t
       - type: const void *