diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index a90d6a934..c095466ba 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -3251,6 +3251,26 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <valid>0:</valid>
     </arg>
   </function>
+  <!-- http://man7.org/linux/man-pages/man3/stpncpy.3.html -->
+  <!-- char *stpncpy(char *dest, const char *src, size_t n); -->
+  <function name="stpncpy">
+    <returnValue type="char *"/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-null/>
+      <minsize type="argvalue" arg="3"/>
+    </arg>
+    <arg nr="2">
+      <not-null/>
+      <not-uninit/>
+    </arg>
+    <arg nr="3">
+      <not-uninit/>
+      <not-bool/>
+      <valid>0:</valid>
+    </arg>
+  </function>
   <!-- http://man7.org/linux/man-pages/man3/memccpy.3.html -->
   <!-- void *memccpy(void *dest, const void *src, int c, size_t n);-->
   <function name="memccpy">