diff --git a/lib/rbs/types.rb b/lib/rbs/types.rb
index 5fa045f8a..597877576 100644
--- a/lib/rbs/types.rb
+++ b/lib/rbs/types.rb
@@ -1421,7 +1421,8 @@ def sub(s)
         self.class.new(
           type: type.sub(s),
           required: required,
-          self_type: self_type&.sub(s)
+          self_type: self_type&.sub(s),
+          location: location
         )
       end
 
@@ -1429,7 +1430,8 @@ def map_type(&block)
         Block.new(
           required: required,
           type: type.map_type(&block),
-          self_type: self_type ? yield(self_type) : nil
+          self_type: self_type ? yield(self_type) : nil,
+          location: location
         )
       end
     end