diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/PrefsDelegate.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/PrefsDelegate.java
index d4ef1b937..7893d5df2 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/PrefsDelegate.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/PrefsDelegate.java
@@ -279,7 +279,7 @@ public class PrefsDelegate extends DelegateBase
                 NagTurnReceiver.resetNagsDisabled( mActivity );
                 break;
             case R.string.key_disable_mqtt:
-                boolean enabled = sp.getBoolean( key, true );
+                boolean enabled = !sp.getBoolean( key, true );
                 MQTTUtils.setEnabled( mActivity, enabled );
                 break;
             case R.string.key_disable_bt: