diff --git a/src/hb-ot-color-colr-table.hh b/src/hb-ot-color-colr-table.hh
index 08fb5a073..5ed02cac2 100644
--- a/src/hb-ot-color-colr-table.hh
+++ b/src/hb-ot-color-colr-table.hh
@@ -193,6 +193,8 @@ struct Variable
 template <typename T>
 struct NoVariable
 {
+  uint32_t varIdxBase = VarIdx::NO_VARIATION;
+
   NoVariable<T>* copy (hb_serialize_context_t *c) const
   {
     TRACE_SERIALIZE (this);