diff --git a/main/main.c b/main/main.c
index e33ef29d61b..cfa84ba0959 100644
--- a/main/main.c
+++ b/main/main.c
@@ -346,7 +346,7 @@ static PHP_INI_MH(OnChangeMemoryLimit)
 		}
 
 		zend_ini_entry *max_mem_limit_ini = zend_hash_str_find_ptr(EG(ini_directives), ZEND_STRL("max_memory_limit"));
-		entry->value = zend_string_copy(max_mem_limit_ini->value);
+		entry->value = zend_string_init(ZSTR_VAL(max_mem_limit_ini->value), ZSTR_LEN(max_mem_limit_ini->value), true);
 		PG(memory_limit) = PG(max_memory_limit);
 
 		return SUCCESS;