diff --git a/exim4/README.md b/exim4/README.md
index d1f2000c6900d17436dcd17e854592561f05fdba..e4ac801cdedfe32c664ce45758cc6faae56d43aa 100644
--- a/exim4/README.md
+++ b/exim4/README.md
@@ -11,7 +11,7 @@ The container exposes TCP ports 25 (SMTP) and 587 (submission).
 Name | Description
 \-\-\- | \-\-\-
 `CLAMD_ADDRESS` | Address of the clamd server (see http://exim.org/exim-html-current/doc/html/spec\_html/ch-content\_scanning\_at\_acl\_time.htm).
-`DKIM_PRIVATE_KEY` |
+`DKIM_KEY_FILE` |
 `DKIM_SELECTOR` |
 `LDAP_URIS` |
 `LDAP_BASEDN` |
diff --git a/exim4/entrypoint b/exim4/entrypoint
index 9ff83cffb314e777b65e345f4e6ca91998a88f10..f6877cd3f490a79b5cc645469e580037a1e9dd98 100755
--- a/exim4/entrypoint
+++ b/exim4/entrypoint
@@ -22,7 +22,7 @@ fi
 
 # Generate a DKIM keys if none are specifiec.
 
-if [ "${DKIM_PRIVATE_KEY:-/etc/exim4/dkim.key}" = "/etc/exim4/dkim.key" ]
+if [ "${DKIM_KEY_FILE:-/etc/exim4/dkim.key}" = "/etc/exim4/dkim.key" ]
 then
     echo Generating DKIM keys. >&2
     openssl genrsa -out /etc/exim4/dkim.key 2048