diff --git a/vyper/venom/ir_node_to_venom.py b/vyper/venom/ir_node_to_venom.py
index 2c99cf5668..fb9a606567 100644
--- a/vyper/venom/ir_node_to_venom.py
+++ b/vyper/venom/ir_node_to_venom.py
@@ -113,6 +113,8 @@
 
 # convert IRnode directly to venom
 def ir_node_to_venom(ir: IRnode) -> IRContext:
+    _ = ir.unique_symbols  # run unique symbols check
+
     global _global_symbols
     _global_symbols = {}