diff --git a/sources/Errors.class.php b/sources/Errors.class.php
index a0d4490c23..a700edae20 100644
--- a/sources/Errors.class.php
+++ b/sources/Errors.class.php
@@ -124,7 +124,7 @@ public function removeError($error)
 				$error = $error[0];
 
 			foreach ($this->_errors as $severity => $errors)
-				if (in_array($error, $errors))
+				if (array_key_exists($error, $errors))
 					unset($this->_errors[$severity][$error]);
 		}
 	}