diff --git a/tools/cooja/java/se/sics/cooja/Simulation.java b/tools/cooja/java/se/sics/cooja/Simulation.java
index 125e907d5..71c5bfc86 100644
--- a/tools/cooja/java/se/sics/cooja/Simulation.java
+++ b/tools/cooja/java/se/sics/cooja/Simulation.java
@@ -1104,9 +1104,6 @@ public class Simulation extends Observable implements Runnable {
    * @return True if simulation is runnable
    */
   public boolean isRunnable() {
-    if (motes.isEmpty()) {
-      return false;
-    }
     return isRunning || hasPollRequests || eventQueue.peekFirst() != null;
   }