diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index a6467638f..b7d956996 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -2822,6 +2822,44 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-bool/>
     </arg>
   </function>
+  <!-- int getnameinfo(const struct sockaddr *restrict sa,
+                       socklen_t salen,
+                       char *restrict node,
+                       socklen_t nodelen,
+                       char *restrict service,
+                       socklen_t servicelen,
+                       int flags); -->
+  <function name="getnameinfo">
+    <noreturn>false</noreturn>
+    <returnValue type="int"/>
+    <leak-ignore/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+      <minsize type="argvalue" arg="2"/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="3" direction="out">
+      <minsize type="argvalue" arg="4"/>
+    </arg>
+    <arg nr="4" direction="in">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="5" direction="out">
+      <minsize type="argvalue" arg="6"/>
+    </arg>
+    <arg nr="6" direction="in">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="7" direction="in">
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function>
   <!-- const char *gai_strerror(int ecode); -->
   <function name="gai_strerror">
     <noreturn>false</noreturn>