diff --git a/sio/arrowio/writer.go b/sio/arrowio/writer.go
index a2376134d..96db758f2 100644
--- a/sio/arrowio/writer.go
+++ b/sio/arrowio/writer.go
@@ -531,6 +531,7 @@ func isRecursive(typ super.Type, seen map[string]struct{}) bool {
 			return true
 		}
 		seen[typ.Name] = struct{}{}
+		defer delete(seen, typ.Name)
 		return isRecursive(typ.Type, seen)
 	case *super.TypeRecord:
 		for _, f := range typ.Fields {
diff --git a/sio/arrowio/ztests/roundtrip.yaml b/sio/arrowio/ztests/roundtrip.yaml
index fa2c09091..473a6d737 100644
--- a/sio/arrowio/ztests/roundtrip.yaml
+++ b/sio/arrowio/ztests/roundtrip.yaml
@@ -117,3 +117,19 @@ inputs:
 outputs:
   - name: stdout
     data: *stdin
+
+---
+
+script: |
+  super -f arrows - | super -i arrows -s -
+
+inputs:
+  - name: stdin
+    data: |
+      type named = int64
+      {a:1::named,b:2::named}
+
+outputs:
+  - name: stdout
+    data: |
+      {a:1,b:2}
diff --git a/sio/arrowio/ztests/writer-errors.yaml b/sio/arrowio/ztests/writer-errors.yaml
index 8cfab586e..9d1739ae6 100644
--- a/sio/arrowio/ztests/writer-errors.yaml
+++ b/sio/arrowio/ztests/writer-errors.yaml
@@ -1,7 +1,10 @@
 script: |
+
   ! echo '{a:1} {b:2}' | super -f arrows -
   ! echo 1 | super -f arrows -
   ! echo {} | super -f arrows -
+  ! echo 'type T={a:T|int64} {a:1}::T' | super -f arrows -
+
 
 outputs:
   - name: stderr
@@ -9,3 +12,4 @@ outputs:
         arrowio: encountered multiple types (consider 'fuse'): {a:int64} and {b:int64}
         arrowio: not a record: 1
         arrowio: unsupported type: empty record
+        arrowio: unsupported type: T
diff --git a/sio/parquetio/ztests/types.yaml b/sio/parquetio/ztests/types.yaml
index ac642fb85..abb7c5da6 100644
--- a/sio/parquetio/ztests/types.yaml
+++ b/sio/parquetio/ztests/types.yaml
@@ -73,3 +73,21 @@ outputs:
           2: null
         }
       }
+
+
+---
+
+script: |
+  super -f parquet -o f.parquet -
+  super -s f.parquet
+
+inputs:
+  - name: stdin
+    data: |
+      type named = int64
+      {a:1::named,b:2::named}
+
+outputs:
+  - name: stdout
+    data: |
+      {a:1,b:2}
diff --git a/sio/parquetio/ztests/writer-errors.yaml b/sio/parquetio/ztests/writer-errors.yaml
index 508046033..9763b840d 100644
--- a/sio/parquetio/ztests/writer-errors.yaml
+++ b/sio/parquetio/ztests/writer-errors.yaml
@@ -2,12 +2,15 @@ script: |
   ! echo '{a:1} {b:2}' | super -f parquet -
   ! echo 1 | super -f parquet -
   ! echo {} | super -f parquet -
+  ! echo 'type T={a:T|int64} {a:1}::T' | super -f parquet -
   ! echo {a:1s} | super -f parquet -
 
+
 outputs:
   - name: stderr
     data: |
         parquetio: encountered multiple types (consider 'fuse'): {a:int64} and {b:int64}
         parquetio: not a record: 1
         parquetio: unsupported type: empty record
+        parquetio: unsupported type: T
         parquetio: unsupported type: not implemented: support for DURATION