diff --git a/agent/command.c b/agent/command.c
index 8642498d6..145c9595a 100644
--- a/agent/command.c
+++ b/agent/command.c
@@ -1030,9 +1030,13 @@ cmd_readkey (assuan_context_t ctx, char *line)
           goto leave;
         }
 
-      rc = agent_write_shadow_key (grip, serialno, keyid, pkbuf, 0);
-      if (rc)
-        goto leave;
+      if (agent_key_available (grip))
+        {
+          /* (Shadow)-key is not available in our key storage.  */
+          rc = agent_write_shadow_key (grip, serialno, keyid, pkbuf, 0);
+          if (rc)
+            goto leave;
+        }
 
       rc = assuan_send_data (ctx, pkbuf, pkbuflen);
     }
diff --git a/agent/keyformat.txt b/agent/keyformat.txt
index 24d742048..259166aba 100644
--- a/agent/keyformat.txt
+++ b/agent/keyformat.txt
@@ -44,9 +44,8 @@ convention.  Example (here indented with two spaces):
      (#D2760001240102000005000011730000# OPENPGP.1)
     )))
 
-GnuPG 2.2 is able to read and update keys using the new format, but
-will not create new files using the new format.  Furthermore, it only
-makes use of the value stored under the name 'Key:'.
+GnuPG 2.2 is also able to read and write keys using the new format
+However, it only makes use of the value stored under the name 'Key:'.
 
 Keys in the extended format can be recognized by looking at the first
 byte of the file.  If it starts with a '(' it is a naked S-expression,