diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/RadioactivityListener.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/RadioactivityListener.java
index add59b3c79..49a3d95971 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/RadioactivityListener.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/RadioactivityListener.java
@@ -7,6 +7,7 @@
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.entity.PlayerDeathEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
 
 /**
  * {@link RadioactivityListener} handles radioactivity level resets
@@ -25,4 +26,10 @@ public void onPlayerDeath(@Nonnull PlayerDeathEvent e) {
         RadiationUtils.clearExposure(e.getEntity());
         RadiationTask.addGracePeriod(e.getEntity());
     }
+
+    @EventHandler
+    public void onPlayerJoin(@Nonnull PlayerJoinEvent e) {
+        RadiationUtils.clearExposure(e.getPlayer());
+        RadiationTask.addGracePeriod(e.getPlayer());
+    }
 }