diff --git a/tasks/ast_tools/src/generators/raw_transfer.rs b/tasks/ast_tools/src/generators/raw_transfer.rs
index 538942a739a10..ce902a61fd8b4 100644
--- a/tasks/ast_tools/src/generators/raw_transfer.rs
+++ b/tasks/ast_tools/src/generators/raw_transfer.rs
@@ -811,12 +811,12 @@ impl Replacer for PosOffsetReplacer<'_, '_> {
 
         let mut field_names = caps.get(2).unwrap().as_str().split('.');
         let field_name = field_names.next().unwrap();
-        let field = struct_def.fields.iter().find(|field| field.name() == field_name).unwrap();
+        let field = struct_def.field_by_name(field_name);
         let mut offset = self.struct_offset + field.offset_64();
         let mut type_def = field.type_def(self.schema);
         for field_name in field_names {
             let struct_def = type_def.as_struct().unwrap();
-            let field = struct_def.fields.iter().find(|field| field.name() == field_name).unwrap();
+            let field = struct_def.field_by_name(field_name);
             offset += field.offset_64();
             type_def = field.type_def(self.schema);
         }
diff --git a/tasks/ast_tools/src/schema/defs/struct.rs b/tasks/ast_tools/src/schema/defs/struct.rs
index fc3d023863f27..06b84059fe8f8 100644
--- a/tasks/ast_tools/src/schema/defs/struct.rs
+++ b/tasks/ast_tools/src/schema/defs/struct.rs
@@ -105,6 +105,14 @@ impl StructDef {
     pub fn field_indices(&self) -> Range<usize> {
         0..self.fields.len()
     }
+
+    /// Get reference to [`FieldDef`] for field called `name`.
+    ///
+    /// # Panics
+    /// Panics if struct does not have a field called `name`.
+    pub fn field_by_name(&self, name: &str) -> &FieldDef {
+        self.fields.iter().find(|field| field.name() == name).unwrap()
+    }
 }
 
 impl Def for StructDef {