diff --git a/core/src/io/anuke/mindustry/core/NetServer.java b/core/src/io/anuke/mindustry/core/NetServer.java
index fb04aebf5f..da30e5efd2 100644
--- a/core/src/io/anuke/mindustry/core/NetServer.java
+++ b/core/src/io/anuke/mindustry/core/NetServer.java
@@ -98,7 +98,7 @@ public class NetServer extends Module{
                 return;
             }
 
-            if(packet.version == -1 && Version.build != -1 && admins.allowsCustomClients()){
+            if(packet.version == -1 && Version.build != -1 && !admins.allowsCustomClients()){
                 kick(id, KickReason.customClient);
                 return;
             }
diff --git a/core/src/io/anuke/mindustry/net/Administration.java b/core/src/io/anuke/mindustry/net/Administration.java
index 9268854596..c63f628c2b 100644
--- a/core/src/io/anuke/mindustry/net/Administration.java
+++ b/core/src/io/anuke/mindustry/net/Administration.java
@@ -43,11 +43,12 @@ public class Administration {
     }
 
     public boolean allowsCustomClients(){
-        return Settings.getBool("kick-custom", headless);
+        return Settings.getBool("allow-custom", !headless);
     }
 
     public void setCustomClients(boolean allowed){
-        Settings.getBool("kick-custom", allowed);
+        Settings.putBool("allow-custom", allowed);
+        Settings.save();
     }
 
     public boolean isValidateReplace(){