diff --git a/src/Map.js b/src/Map.js
index e57e8cb..1be6af5 100644
--- a/src/Map.js
+++ b/src/Map.js
@@ -68,7 +68,15 @@ function list_polygons(request, center, ratio,/* ind,*/ cb, selectedRoom)
           */return [(z[1]-center[1])/25, (z[0]-center[0])/25];
         //}
       })
-    })).map((x) => {return <Polygon positions={x} key={k} color={selectedRoom === k ? 'red' : 'grey'} onClick={() => cb(k)}><Tooltip>{k}</Tooltip></Polygon>})];
+    })).map((x) => {
+      //return <Polygon positions={x} key={k} color={selectedRoom === k ? 'red' : 'grey'} onClick={() => cb(k)}><Tooltip>{k}</Tooltip></Polygon>
+
+      const color = selectedRoom === k ? 'red' : 'grey';
+
+      return <Polygon positions={x} key={k + color} color={color} onClick={() => cb(k)}>
+        <Tooltip>{k}</Tooltip>
+      </Polygon>
+    })];
 //    })).map((x) => {tarace = tarace+1; return <Polygon positions={x} key={k} pathOptions={{color: 'grey'}}><Tooltip permanent direction={tarace % 2 === 0 ? "bottom" : "top"}>{k}</Tooltip><Popup>Popup</Popup></Polygon>})];
   }
   return polygons;