diff --git a/processor/dispatch.m4 b/processor/dispatch.m4
index 2fa2dad..637b461 100644
--- a/processor/dispatch.m4
+++ b/processor/dispatch.m4
@@ -1,6 +1,7 @@
 dnl DISPATCH(1:type, 2:elm)
 define(`DISPATCH', `
 	DBG(`$0($*)')
+	assert(sizeof($1) == sizeof(src->$2));
 	ifelse(
 		`$1', `zend_bool',        `PROC_INT(`$2', `u',  `$1')'
 	, `$1', `zend_uchar',       `PROC_INT(`$2', `u',  `$1')'
diff --git a/processor/processor.m4 b/processor/processor.m4
index 8305650..da237c4 100644
--- a/processor/processor.m4
+++ b/processor/processor.m4
@@ -149,7 +149,11 @@ dnl }}}
 		DONE(value)
 		DISPATCH(zval_data_type, type)
 		DISPATCH(zend_uchar, is_ref)
+#ifdef ZEND_ENGINE_2
+		DISPATCH(zend_uint, refcount)
+#else
 		DISPATCH(zend_ushort, refcount)
+#endif
 #ifdef ZEND_ENGINE_2_3
 		DISPATCH(zend_uchar, idx_type)
 #endif