diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index 585e06a3d..b659965ca 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -1824,6 +1824,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
   <function name="pipe">
     <returnValue type="int"/>
     <noreturn>false</noreturn>
+    <use-retval/>
     <arg nr="1" direction="out">
       <not-null/>
       <not-bool/>