diff --git a/cfg/std.cfg b/cfg/std.cfg
index 5726465ee..cd05dec5f 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -1619,6 +1619,9 @@
     <use-retval/>
     <noreturn>false</noreturn>
     <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
   </function>
   <function name="strcspn">
     <use-retval/>