diff --git a/src/schema/rules/datatypes/anat.yaml b/src/schema/rules/datatypes/anat.yaml
index 82d99b44b9..b1a470c2ef 100644
--- a/src/schema/rules/datatypes/anat.yaml
+++ b/src/schema/rules/datatypes/anat.yaml
@@ -105,6 +105,7 @@
     acquisition: optional
     ceagent: optional
     reconstruction: optional
+    echo: optional
     flip: required
     part: optional