diff --git a/CHANGELOG.md b/CHANGELOG.md
index b322d303e..dbf25bd66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -98,7 +98,8 @@ With these lines:
   SSLVerifyDepth 1
   SSLCACertificateFile /home/registry/registry/shared/ca/certs/ca.crt.pem
   SSLCARevocationFile /home/registry/registry/shared/ca/crl/crl.pem
-  SSLCARevocationCheck chain
+  # Uncomment this when upgrading to apache 2.4:
+  # SSLCARevocationCheck chain
   RequestHeader set SSL_CLIENT_S_DN_CN "%{SSL_CLIENT_S_DN_CN}s"
 ```
 
@@ -113,7 +114,8 @@ Add these lines:
   SSLVerifyDepth 1
   SSLCACertificateFile /home/registry/registry/shared/ca/certs/ca.crt.pem
   SSLCARevocationFile /home/registry/registry/shared/ca/crl/crl.pem
-  SSLCARevocationCheck chain
+  # Uncomment this when upgrading to apache 2.4:
+  # SSLCARevocationCheck chain
 
   RequestHeader set SSL_CLIENT_S_DN_CN ""
 
diff --git a/README.md b/README.md
index 384814f8f..bc2b9af13 100644
--- a/README.md
+++ b/README.md
@@ -154,7 +154,8 @@ Be sure to update paths to match your system configuration.
     SSLVerifyDepth 1
     SSLCACertificateFile /home/registry/registry/shared/ca/certs/ca.crt.pem
     SSLCARevocationFile /home/registry/registry/shared/ca/crl/crl.pem
-    SSLCARevocationCheck chain
+    # Uncomment this when upgrading to apache 2.4:
+    # SSLCARevocationCheck chain
 
     RequestHeader set SSL_CLIENT_S_DN_CN "%{SSL_CLIENT_S_DN_CN}s"