diff --git a/lib/libc/stdlib/realpath.3 b/lib/libc/stdlib/realpath.3
index c7384d60703..33970fd946a 100644
--- a/lib/libc/stdlib/realpath.3
+++ b/lib/libc/stdlib/realpath.3
@@ -42,7 +42,7 @@
 .Sh SYNOPSIS
 .In stdlib.h
 .Ft "char *"
-.Fn realpath "const char *pathname" "char *resolved_path"
+.Fn realpath "const char * restrict pathname" "char * restrict resolved_path"
 .Sh DESCRIPTION
 The
 .Fn realpath