diff --git a/spec/schemas/nodes.info.yaml b/spec/schemas/nodes.info.yaml
index 5a71faa24..c4e9a39f9 100644
--- a/spec/schemas/nodes.info.yaml
+++ b/spec/schemas/nodes.info.yaml
@@ -66,9 +66,17 @@ components:
             $ref: '#/components/schemas/NodeThreadPoolInfo'
         total_indexing_buffer:
           description: Total heap allowed to be used to hold recently indexed documents before they must be written to disk. This size is a shared pool across all shards on this node, and is controlled by Indexing Buffer settings.
-          $ref: '_common.yaml#/components/schemas/HumanReadableByteCount'
+          oneOf:
+            - $ref: '_common.yaml#/components/schemas/ByteCount'
+              x-version-removed: 3.0
+            - $ref: '_common.yaml#/components/schemas/HumanReadableByteCount'
+              x-version-added: 3.0
         total_indexing_buffer_in_bytes:
-          $ref: '_common.yaml#/components/schemas/ByteCount'
+          oneOf:
+            - $ref: '_common.yaml#/components/schemas/HumanReadableByteCount'
+              x-version-removed: 3.0
+            - $ref: '_common.yaml#/components/schemas/ByteCount'
+              x-version-added: 3.0
         transport:
           $ref: '#/components/schemas/NodeInfoTransport'
         transport_address: