diff --git a/piker/data/_symcache.py b/piker/data/_symcache.py
index fc1057a0..6a28b492 100644
--- a/piker/data/_symcache.py
+++ b/piker/data/_symcache.py
@@ -76,7 +76,7 @@ class SymbologyCache(Struct):
 
     # all asset-money-systems descriptions as minimally defined by
     # in `.accounting.Asset`
-    assets: dict[str, Asset] = field(default_factory=dict)
+    assets: dict[str, 'Asset'] = field(default_factory=dict)
 
     # backend-system pairs loaded in provider (schema) specific
     # structs.