diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 8df98cf..2e29e4a 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -299,7 +299,7 @@
 .. function:: getresgid()
 
    Return a tuple (rgid, egid, sgid) denoting the current process's
-   real, effective, and saved user ids.
+   real, effective, and saved group ids.
 
    Availability: Unix.