diff --git a/Spigot-Server-Patches/Optimize-Navigation-Listener.patch b/Spigot-Server-Patches/Optimize-Navigation-Listener.patch
index 5b2d38a9b..b47e6a816 100644
--- a/Spigot-Server-Patches/Optimize-Navigation-Listener.patch
+++ b/Spigot-Server-Patches/Optimize-Navigation-Listener.patch
@@ -66,6 +66,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -            for (int k = 0; k < j; ++k) {
 -                NavigationAbstract navigationabstract = anavigationabstract1[k];
 +            */
++            // DO NOT USE AN ITERATOR! This must be a for (;;) to avoid CME.
++            // This is perfectly safe, as additions are ok to be done in this iteration
++            // and Removals are queued instead of immediate.
 +            for (int k = 0; k < this.navigators.size(); ++k) {
 +                NavigationAbstract navigationabstract = this.navigators.get(k);
 +                // Paper end