diff --git a/zend_tombs_strings.c b/zend_tombs_strings.c
index 7b84cb0..ae75a27 100644
--- a/zend_tombs_strings.c
+++ b/zend_tombs_strings.c
@@ -103,7 +103,6 @@ static zend_always_inline zend_tombs_string_t* zend_tombs_strings_copy(zend_stri
            ZSTR_VAL(string),
            ZSTR_LEN(string));
 
-    copy->value[ZSTR_LEN(string)] = 0;
     copy->hash = ZSTR_HASH(string);
 
     __atomic_store_n(&copy->length, ZSTR_LEN(string), __ATOMIC_SEQ_CST);