diff --git a/man7/credentials.7 b/man7/credentials.7
index 2bb34472d..c3cf2eb26 100644
--- a/man7/credentials.7
+++ b/man7/credentials.7
@@ -223,9 +223,9 @@ when checking the limit on the number of inotify instances
 that the process may create; see
 .BR inotify (7).
 .SH "CONFORMING TO"
-Process IDs, parent process IDs, process group IDs and session IDs
+Process IDs, parent process IDs, process group IDs, and session IDs
 are specified in POSIX.1-2001.
-The real, effective and saved set IDs are specified in POSIX.1-2001.
+The real, effective, and saved set IDs are specified in POSIX.1-2001.
 The file system IDs are a Linux extension.
 .SH NOTES
 Credentials are shared by all of the threads in a process.