1 files changed, 1 insertions, 0 deletions
diff --git a/var.h b/var.h
index 3ebc1021..7daf2f27 100644
--- a/var.h
+++ b/var.h
@@ -58,6 +58,7 @@ BEGINinterface(var) /* name must also be changed in ENDinterface macro! */
 	rsRetVal (*ConvToNumber)(var_t *pThis);
 	rsRetVal (*ConvToBool)(var_t *pThis);
 	rsRetVal (*ConvToString)(var_t *pThis);
+	rsRetVal (*Duplicate)(var_t *pThis, var_t **ppNew);
 ENDinterface(var)
 #define varCURR_IF_VERSION 1 /* increment whenever you change the interface above! */