diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index cad50db53..6de3b6282 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -1256,6 +1256,7 @@ The obsolescent function 'usleep' is called. POSIX.1-2001 declares usleep() func
       <not-null/>
       <not-uninit/>
       <not-bool/>
+      <strz/>
     </arg>
   </function>
   <!-- int mkstemp(char *template); -->
@@ -2100,12 +2101,12 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <arg nr="1" direction="in">
       <not-null/>
       <not-uninit/>
-      <strz/>
+      <minsize type="argvalue" arg="3"/>
     </arg>
     <arg nr="2" direction="in">
       <not-null/>
       <not-uninit/>
-      <strz/>
+      <minsize type="argvalue" arg="3"/>
     </arg>
     <arg nr="3" direction="in">
       <not-bool/>
@@ -2123,10 +2124,12 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <arg nr="1" direction="in">
       <not-null/>
       <not-uninit/>
+      <minsize type="argvalue" arg="3"/>
     </arg>
     <arg nr="2" direction="in">
       <not-null/>
       <not-uninit/>
+      <minsize type="argvalue" arg="3"/>
     </arg>
     <arg nr="3" direction="in">
       <not-bool/>
@@ -4442,11 +4445,13 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <arg nr="1" direction="in">
       <not-null/>
       <not-uninit/>
+      <strz/>
     </arg>
     <arg nr="2" direction="in">
       <not-null/>
       <not-uninit/>
       <not-bool/>
+      <strz/>
     </arg>
     <warn severity="style" reason="Obsolescent" alternatives="wcsstr"/>
   </function>
@@ -5139,6 +5144,8 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-null/>
       <not-uninit/>
       <not-bool/>
+      <minsize type="argvalue" arg="2"/>   
+      <strz/>   
     </arg>
     <arg nr="2" direction="in">
       <not-uninit/>
@@ -5448,6 +5455,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <arg nr="2" direction="in">
       <not-null/>
       <not-uninit/>
+      <minsize type="argvalue" arg="3"/>
     </arg>
     <arg nr="3" direction="in">
       <not-uninit/>