diff --git a/doc/man1/openssl-storeutl.pod.in b/doc/man1/openssl-storeutl.pod.in
index bdae5995553d7..75acb077430c8 100644
--- a/doc/man1/openssl-storeutl.pod.in
+++ b/doc/man1/openssl-storeutl.pod.in
@@ -45,8 +45,11 @@ Print out a usage message.
 
 =item B<-out> I<filename>
 
-specifies the output filename to write to or standard output by
-default.
+This specifies the output file to write to.
+Standard output is used if this option is not present.
+The output file can be the same as the input,
+which leads to replacing the file contents.
+Note that file I/O is not atomic. The output file is truncated and then written.
 
 =item B<-noout>