diff --git a/lib/scenic/adapters/postgres.rb b/lib/scenic/adapters/postgres.rb
index 2faa4c34..b182ac32 100644
--- a/lib/scenic/adapters/postgres.rb
+++ b/lib/scenic/adapters/postgres.rb
@@ -238,7 +238,7 @@ def refresh_materialized_view(name, concurrently: false, cascade: false)
       def populated?(name)
         raise_unless_materialized_views_supported
 
-        schemaless_name = name.split(".").last
+        schemaless_name = name.to_s.split(".").last
 
         sql = "SELECT relispopulated FROM pg_class WHERE relname = '#{schemaless_name}'"
         relations = execute(sql)