diff --git a/src/types/packed_types/packed_f64.record.yaml b/src/types/packed_types/packed_f64.record.yaml
index 48b42b18..4111b3a4 100644
--- a/src/types/packed_types/packed_f64.record.yaml
+++ b/src/types/packed_types/packed_f64.record.yaml
@@ -1,7 +1,11 @@
 ---
 description: Single component record for holding packed 64-bit floating point number.
+with:
+  - Interfaces
+preamble: |
+   subtype Float_64 is Interfaces.IEEE_Float_64;
 fields:
   - name: Value
     description: The 64-bit floating point number.
-    type: Interfaces.IEEE_Float_64
+    type: Float_64
     format: F64