diff --git a/cfg/std.cfg b/cfg/std.cfg
index 772172266..5a7755499 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <def>
   <function name="abort"><noreturn>true</noreturn></function>
-  <function name="abs"><noreturn>false</noreturn><leak-ignore/><arg nr="1"><not-uninit/></arg></function>
+  <function name="abs"><noreturn>false</noreturn><leak-ignore/><arg nr="1"><not-uninit/><not-bool/></arg></function>
   <function name="acos"><noreturn>false</noreturn><leak-ignore/><arg nr="1"><not-uninit/></arg></function>
   <function name="asctime"><noreturn>false</noreturn><leak-ignore/><arg nr="1"><not-uninit/></arg></function>
   <function name="asin"><noreturn>false</noreturn><leak-ignore/><arg nr="1"><not-uninit/></arg></function>