diff --git a/libc/tools/gensyscalls.py b/libc/tools/gensyscalls.py
index 4e24077..7e11418 100755
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -286,8 +286,9 @@
     for alias in aliases:
         stub += function_alias % { "func" : syscall["func"], "alias" : alias }
 
-    # Use hidden visibility for any functions beginning with underscores.
-    if pointer_length == 64 and syscall["func"].startswith("__"):
+    # Use hidden visibility on LP64 for any functions beginning with underscores.
+    # Force hidden visibility for any functions which begin with 3 underscores
+    if (pointer_length == 64 and syscall["func"].startswith("__")) or syscall["func"].startswith("___"):
         stub += '.hidden ' + syscall["func"] + '\n'
 
     return stub