diff --git a/packages/rxdart/analysis_options.yaml b/packages/rxdart/analysis_options.yaml
index 44db74b1..6f808f61 100644
--- a/packages/rxdart/analysis_options.yaml
+++ b/packages/rxdart/analysis_options.yaml
@@ -4,6 +4,7 @@ analyzer:
   language:
     strict-casts: true
     strict-raw-types: true
+    strict-inference: true
 
 linter:
   rules: