diff --git a/src/pocketmine/permission/PermissibleBase.php b/src/pocketmine/permission/PermissibleBase.php
index 781f9fbc3..0ee752042 100644
--- a/src/pocketmine/permission/PermissibleBase.php
+++ b/src/pocketmine/permission/PermissibleBase.php
@@ -69,7 +69,7 @@ class PermissibleBase implements Permissible{
 	 */
 	public function setOp($value){
 		if($this->opable === null){
-			trigger_error("Cannot change ip value as no ServerOperator is set", E_USER_WARNING);
+			trigger_error("Cannot change op value as no ServerOperator is set", E_USER_WARNING);
 
 			return;
 		}else{
@@ -217,4 +217,4 @@ class PermissibleBase implements Permissible{
 	public function getEffectivePermissions(){
 		return $this->permissions;
 	}
-}
\ No newline at end of file
+}