diff --git a/runelite-client/src/main/java/net/runelite/client/input/KeyManager.java b/runelite-client/src/main/java/net/runelite/client/input/KeyManager.java
index d4bfb6a8db..d8e5c81a11 100644
--- a/runelite-client/src/main/java/net/runelite/client/input/KeyManager.java
+++ b/runelite-client/src/main/java/net/runelite/client/input/KeyManager.java
@@ -36,7 +36,10 @@ public class KeyManager
 
 	public void registerKeyListener(KeyListener keyListener)
 	{
-		keyListeners.add(keyListener);
+		if (!keyListeners.contains(keyListener))
+		{
+			keyListeners.add(keyListener);
+		}
 	}
 
 	public void unregisterKeyListener(KeyListener keyListener)
diff --git a/runelite-client/src/main/java/net/runelite/client/input/MouseManager.java b/runelite-client/src/main/java/net/runelite/client/input/MouseManager.java
index 41656664f0..dbb8bd3695 100644
--- a/runelite-client/src/main/java/net/runelite/client/input/MouseManager.java
+++ b/runelite-client/src/main/java/net/runelite/client/input/MouseManager.java
@@ -38,7 +38,10 @@ public class MouseManager
 
 	public void registerMouseListener(MouseListener mouseListener)
 	{
-		mouseListeners.add(mouseListener);
+		if (!mouseListeners.contains(mouseListener))
+		{
+			mouseListeners.add(mouseListener);
+		}
 	}
 
 	public void unregisterMouseListener(MouseListener mouseListener)
@@ -48,7 +51,10 @@ public class MouseManager
 
 	public void registerMouseWheelListener(MouseWheelListener mouseWheelListener)
 	{
-		mouseWheelListeners.add(mouseWheelListener);
+		if (!mouseWheelListeners.contains(mouseWheelListener))
+		{
+			mouseWheelListeners.add(mouseWheelListener);
+		}
 	}
 
 	public void unregisterMouseWheelListener(MouseWheelListener mouseWheelListener)