diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index 29bb3aef2..e6c08463f 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -1096,7 +1096,6 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <returnValue type="int"/>
     <arg nr="1" direction="in">
       <not-uninit/>
-      <valid>0:</valid>
     </arg>
     <arg nr="2" direction="in">
       <not-null/>