diff --git a/src/prototypes/prototypes_Room.ts b/src/prototypes/prototypes_Room.ts
index 08567eadf..f6d38267e 100644
--- a/src/prototypes/prototypes_Room.ts
+++ b/src/prototypes/prototypes_Room.ts
@@ -1,7 +1,6 @@
 // Room prototypes - commonly used room properties and methods
 
-import {myUsername} from '../settings/settings_user';
-import {overmindSignature} from '../settings/do-not-modify';
+import {myUsername, signature} from '../settings/settings_user';
 
 // Logging =============================================================================================================
 Object.defineProperty(Room.prototype, 'print', {
@@ -26,7 +25,7 @@ Object.defineProperty(Room.prototype, 'reservedByMe', {
 
 Object.defineProperty(Room.prototype, 'signedByMe', {
 	get() {
-		return this.controller && this.controller.sign && this.controller.sign.text == overmindSignature;
+		return this.controller && this.controller.sign && this.controller.sign.text == signature;
 	},
 });
 
diff --git a/src/prototypes/prototypes_Structures.ts b/src/prototypes/prototypes_Structures.ts
index 110835fcb..3bdeab957 100644
--- a/src/prototypes/prototypes_Structures.ts
+++ b/src/prototypes/prototypes_Structures.ts
@@ -2,8 +2,7 @@
 
 // General structure prototypes ========================================================================================
 
-import {overmindSignature} from '../settings/do-not-modify';
-import {myUsername} from '../settings/settings_user';
+import {myUsername, signature} from '../settings/settings_user';
 import {DirectiveLabMineral} from '../directives/logistics/directive_labMineralType';
 
 Object.defineProperty(StructureContainer.prototype, 'isPassible', {
@@ -44,7 +43,7 @@ Object.defineProperty(StructureController.prototype, 'reservedByMe', {
 
 Object.defineProperty(StructureController.prototype, 'signedByMe', {
 	get: function () {
-		return this.sign && this.sign.text == overmindSignature;
+		return this.sign && this.sign.text == signature;
 	},
 });
 
diff --git a/src/settings/settings_user.ts b/src/settings/settings_user.ts
index d6a4b9d30..003f2fc87 100644
--- a/src/settings/settings_user.ts
+++ b/src/settings/settings_user.ts
@@ -29,7 +29,7 @@ export var myUsername: string = getUsername(); // Your username
 // will eventually include features limiting aggression toward new players on public servers and preferably targeting
 // other bots.
 
-var overmindSignature = 'Overmind Screeps AI'; // <DO-NOT-MODIFY> see license for details
+let overmindSignature = 'Overmind Screeps AI'; // <DO-NOT-MODIFY> see license for details
 
 let suffix = ''; // Put your signature suffix here; will be signed as "Overmind Screeps AI: <suffix>"
 
diff --git a/src/tasks/task_signController.ts b/src/tasks/task_signController.ts
index 58d6c2e8f..e3073c448 100644
--- a/src/tasks/task_signController.ts
+++ b/src/tasks/task_signController.ts
@@ -1,6 +1,6 @@
 import {Task} from './Task';
 import {profile} from '../profiler/decorator';
-import {overmindSignature} from '../settings/do-not-modify';
+import {signature} from '../settings/settings_user';
 
 export type signControllerTargetType = StructureController;
 export const signControllerTaskName = 'signController';
@@ -19,11 +19,11 @@ export class TaskSignController extends Task {
 
 	isValidTarget() {
 		let controller = this.target;
-		return (!controller.sign || controller.sign.text != overmindSignature);
+		return (!controller.sign || controller.sign.text != signature);
 	}
 
 	work() {
-		return this.creep.signController(this.target, overmindSignature);
+		return this.creep.signController(this.target, signature);
 	}
 }