diff --git a/runtime/interpreter/value.go b/runtime/interpreter/value.go
index 24c6e0947f..5187bd4c02 100644
--- a/runtime/interpreter/value.go
+++ b/runtime/interpreter/value.go
@@ -17173,7 +17173,7 @@ func (v *CompositeValue) ConformsToStaticType(
 		}
 	}
 
-	fieldsLen := int(v.dictionary.Count())
+	fieldsLen := v.FieldCount()
 
 	computedFields := v.GetComputedFields(interpreter)
 	if computedFields != nil {
@@ -17224,6 +17224,10 @@ func (v *CompositeValue) ConformsToStaticType(
 	return true
 }
 
+func (v *CompositeValue) FieldCount() int {
+	return int(v.dictionary.Count())
+}
+
 func (v *CompositeValue) IsStorable() bool {
 
 	// Only structures, resources, enums, and contracts can be stored.