1 files changed, 2 insertions, 1 deletions
diff --git a/sv.h b/sv.h
index fab44ebc91..4edd87fd33 100644
--- a/sv.h
+++ b/sv.h
@@ -410,7 +410,8 @@ double.  Checks the B<private> setting.  Use C<SvNIOK>.
 Unsets the NV/IV status of an SV.
 
 =for apidoc Am|bool|SvOK|SV* sv
-Returns a boolean indicating whether the value is an SV.
+Returns a boolean indicating whether the value is an SV. It also tells
+whether the value is defined or not.
 
 =for apidoc Am|bool|SvIOKp|SV* sv
 Returns a boolean indicating whether the SV contains an integer.  Checks