diff --git a/cfg/std.cfg b/cfg/std.cfg
index 6d6966998..0bb5049b3 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -5091,7 +5091,6 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
   </function>
   <!-- char *strtok(char *s, const char *ct); -->
   <function name="strtok,std::strtok">
-    <pure/>
     <returnValue type="char *"/>
     <noreturn>false</noreturn>
     <leak-ignore/>