diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index 083cf12b7..d5f369496 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -2175,7 +2175,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-null/>
       <not-uninit/>
       <not-bool/>
-      <minsize type="value" value="3"/>
+      <minsize type="value" value="3" baseType="unsigned short"/>
     </arg>
   </function>
   <!-- long int jrand48(unsigned short xsubi[3]); -->
@@ -2187,7 +2187,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-null/>
       <not-uninit/>
       <not-bool/>
-      <minsize type="value" value="3"/>
+      <minsize type="value" value="3" baseType="unsigned short"/>
     </arg>
   </function>
   <!-- long int nrand48(unsigned short xsubi[3]); -->
@@ -2199,7 +2199,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-null/>
       <not-uninit/>
       <not-bool/>
-      <minsize type="value" value="3"/>
+      <minsize type="value" value="3" baseType="unsigned short"/>
     </arg>
   </function>
   <!-- double erand48(unsigned short xsubi[3]); -->
@@ -2211,7 +2211,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-null/>
       <not-uninit/>
       <not-bool/>
-      <minsize type="value" value="3"/>
+      <minsize type="value" value="3" baseType="unsigned short"/>
     </arg>
   </function>
   <!-- void lcong48(unsigned short param[7]); -->
@@ -2222,7 +2222,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-null/>
       <not-uninit/>
       <not-bool/>
-      <minsize type="value" value="7"/>
+      <minsize type="value" value="7" baseType="unsigned short"/>
     </arg>
   </function>
   <!-- ssize_t read(int fd, void *buf, size_t count); -->