diff --git a/system/libraries/Session/Session.php b/system/libraries/Session/Session.php
index 4948ead2f..6294f5656 100644
--- a/system/libraries/Session/Session.php
+++ b/system/libraries/Session/Session.php
@@ -356,7 +356,11 @@ class CI_Session {
 			{
 				// Add as many more characters as necessary to reach at least 160 bits
 				$sid_length += (int) ceil((160 % $bits) / $bits_per_character);
-				ini_set('session.sid_length', $sid_length);
+				if (PHP_VERSION_ID >= 80400) {
+					@ini_set('session.sid_length', $sid_length);
+				} else {
+					ini_set('session.sid_length', $sid_length);
+				}
 			}
 		}