diff --git a/cfg/std.cfg b/cfg/std.cfg
index 51ee34ffd..5fefc3854 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -5989,6 +5989,26 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
       <not-uninit/>
     </arg>
   </function>
+  <!--std::streamsize std::ios_base::precision(streamsize prec)-->
+  <!--std::streamsize std::ostringstream::precision(streamsize prec)-->
+  <function name="std::ios_base::precision,std::ostringstream::precision">
+    <noreturn>false</noreturn>
+    <returnValue type="std::streamsize"/>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!--void std::ios_base::unsetf (fmtflags mask);-->
+  <!--void std::ifstream::unsetf (fmtflags mask);-->
+  <function name="std::ios_base::unsetf,std::ifstream::unsetf">
+    <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- /*unspecified*/ setbase(int base); -->
   <function name="setbase,std::setbase">
     <noreturn>false</noreturn>