diff --git a/ext/soap/soap.c b/ext/soap/soap.c
index 57a08eb3d23f..653a6aefb493 100644
--- a/ext/soap/soap.c
+++ b/ext/soap/soap.c
@@ -580,7 +580,7 @@ PHP_METHOD(SoapHeader, __construct)
 		if (ZSTR_LEN(actor_str) > 2) {
 			add_property_stringl(this_ptr, "actor", ZSTR_VAL(actor_str), ZSTR_LEN(actor_str));
 		} else {
-			zend_argument_value_error(2, "must be longer than 2 characters");
+			zend_argument_value_error(5, "must be longer than 2 characters");
 			RETURN_THROWS();
 		}
 	} else if (!actor_is_null) {