diff --git a/libc/include/sys/prctl.h b/libc/include/sys/prctl.h
index 1c80415..4e0b4b5 100644
--- a/libc/include/sys/prctl.h
+++ b/libc/include/sys/prctl.h
@@ -40,7 +40,7 @@
 __BEGIN_DECLS
 
 /**
- * [prctl(2)](http://man7.org/linux/man-pages/man2/prctl.2.html) performs a variety of
+ * [prctl(2)](https://man7.org/linux/man-pages/man2/prctl.2.html) performs a variety of
  * operations based on the `PR_` constant passed as the first argument.
  *
  * Returns -1 and sets `errno` on failure; success values vary by option.