diff --git a/scripts/build_env/render_config_env.py b/scripts/build_env/render_config_env.py
index 8ea5383ef..585408f76 100644
--- a/scripts/build_env/render_config_env.py
+++ b/scripts/build_env/render_config_env.py
@@ -16,6 +16,7 @@
 SCHEMAS_DIR = Path(__file__).resolve().parents[2] / "schemas"
 APPDEF_SCHEMA = str(SCHEMAS_DIR / "appdef.schema.json")
 TD_SCHEMA = str(SCHEMAS_DIR / "template-descriptor.schema.json")
+COMPOSITE_SCHEMA = str(SCHEMAS_DIR / "composite-structure.schema.json")
 
 yml = create_yaml_processor()
 
@@ -427,6 +428,7 @@ def generate_composite_structure(self):
             cs_file = Path(current_env_dir) / "composite_structure.yml"
             cs_file.parent.mkdir(parents=True, exist_ok=True)
             self.render_from_file_to_file(Template(composite_structure).render(self.ctx.as_dict()), str(cs_file))
+            validate_yaml_by_scheme_or_fail(cs_file, COMPOSITE_SCHEMA)
 
     def get_rendered_target_path(self, template_path: Path) -> Path:
         path_str = str(template_path)