diff --git a/cfg/std.cfg b/cfg/std.cfg
index bdce83702..50821fd0c 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -282,13 +282,34 @@
     </arg>
   </function>
   <!-- double asin(double x); -->
-  <!-- float asinf(float x); -->
-  <!-- long double asinl(long double x); -->
-  <function name="asin,std::asin,asinf,asinl">
+  <function name="asin,std::asin">
     <use-retval/>
     <pure/>
     <noreturn>false</noreturn>
     <leak-ignore/>
+    <returnValue type="double"/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- float asinf(float x); -->
+  <function name="asinf">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <returnValue type="float"/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- long double asinl(long double x); -->
+  <function name="asinl">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <returnValue type="long double"/>
     <arg nr="1">
       <not-uninit/>
     </arg>