diff --git a/xml/System/Environment+SpecialFolder.xml b/xml/System/Environment+SpecialFolder.xml
index 2ac063278da..e807b410c1e 100644
--- a/xml/System/Environment+SpecialFolder.xml
+++ b/xml/System/Environment+SpecialFolder.xml
@@ -56,7 +56,7 @@
     </Attribute>
   </Attributes>
   <Docs>
-    <summary>Specifies enumerated constants used to retrieve directory paths to system special folders.</summary>
+    <summary>Specifies enumerated Constant Special Item ID List (CSIDL) values used to retrieve directory paths to system special folders.</summary>
     <remarks>
       <format type="text/markdown"><![CDATA[