diff --git a/worldguard-legacy/src/main/java/com/sk89q/worldguard/bukkit/ConfigurationManager.java b/worldguard-legacy/src/main/java/com/sk89q/worldguard/bukkit/ConfigurationManager.java
index 7c08295b..bdadad89 100644
--- a/worldguard-legacy/src/main/java/com/sk89q/worldguard/bukkit/ConfigurationManager.java
+++ b/worldguard-legacy/src/main/java/com/sk89q/worldguard/bukkit/ConfigurationManager.java
@@ -91,6 +91,7 @@ public class ConfigurationManager {
     public boolean keepUnresolvedNames;
 
     @Unreported public Map<String, String> hostKeys = new HashMap<String, String>();
+    public boolean hostKeysAllowFMLClients;
 
     /**
      * Region Storage Configuration method, and config values
@@ -169,6 +170,7 @@ public void load() {
                 hostKeys.put(key.toLowerCase(), value);
             }
         }
+        hostKeysAllowFMLClients = config.getBoolean("security.host-keys-allow-forge-clients", false);
 
         // ====================================================================
         // Region store drivers
diff --git a/worldguard-legacy/src/main/java/com/sk89q/worldguard/bukkit/listener/WorldGuardPlayerListener.java b/worldguard-legacy/src/main/java/com/sk89q/worldguard/bukkit/listener/WorldGuardPlayerListener.java
index 537c68f6..05087c35 100644
--- a/worldguard-legacy/src/main/java/com/sk89q/worldguard/bukkit/listener/WorldGuardPlayerListener.java
+++ b/worldguard-legacy/src/main/java/com/sk89q/worldguard/bukkit/listener/WorldGuardPlayerListener.java
@@ -183,7 +183,8 @@ public void onPlayerLogin(PlayerLoginEvent event) {
                 hostname = hostname.substring(0, colonIndex);
             }
 
-            if (!hostname.equals(hostKey)) {
+            if (!hostname.equals(hostKey)
+                    && !(cfg.hostKeysAllowFMLClients && hostname.equals(hostKey + "\u0000FML\u0000"))) {
                 event.disallow(PlayerLoginEvent.Result.KICK_OTHER,
                         "You did not join with the valid host key!");
                 log.warning("WorldGuard host key check: " +