diff --git a/module/actor.js b/module/actor.js
index 3f1765f6..497bd73d 100644
--- a/module/actor.js
+++ b/module/actor.js
@@ -2450,6 +2450,11 @@ export class RdDActor extends Actor {
 
   /* -------------------------------------------- */
   async displayTMR(mode = "normal") {
+    if (this.currentTMR != undefined && !this.currentTMR.isClosed) {
+      ui.notifications.warn('Vous êtes déja dans les Terres Médianes !');
+      return;
+    }
+
     let isRapide = mode == "rapide";
     if (mode != "visu") {
       let minReveValue = (isRapide && !EffetsDraconiques.isDeplacementAccelere(this) ? 3 : 2) + this.countMonteeLaborieuse();
diff --git a/module/rdd-tmr-dialog.js b/module/rdd-tmr-dialog.js
index 92329451..01a0d3d6 100644
--- a/module/rdd-tmr-dialog.js
+++ b/module/rdd-tmr-dialog.js
@@ -206,6 +206,7 @@ export class RdDTMRDialog extends Dialog {
     if (!this.viewOnly) {
       this._tellToGM(this.actor.name + " a quitté les terres médianes");
     }
+    this.isClosed = true;
   }