diff --git a/packages/babel-types/src/definitions/experimental.js b/packages/babel-types/src/definitions/experimental.js
index 147e5b763a57..6bf4a476cc94 100644
--- a/packages/babel-types/src/definitions/experimental.js
+++ b/packages/babel-types/src/definitions/experimental.js
@@ -109,7 +109,9 @@ defineType("PipelineBareFunction", {
   },
 });
 
-defineType("PipelinePrimaryTopicReference", {});
+defineType("PipelinePrimaryTopicReference", {
+  aliases: ["Expression"],
+});
 
 defineType("OptionalCallExpression", {
   visitor: ["callee", "arguments", "typeParameters", "typeArguments"],
diff --git a/packages/babel-types/src/validators/generated/index.js b/packages/babel-types/src/validators/generated/index.js
index 16fc54c6e15b..e23dc5de2cda 100644
--- a/packages/babel-types/src/validators/generated/index.js
+++ b/packages/babel-types/src/validators/generated/index.js
@@ -3212,6 +3212,7 @@ export function isExpression(node: Object, opts?: Object): boolean {
     "AwaitExpression" === nodeType ||
     "BindExpression" === nodeType ||
     "OptionalMemberExpression" === nodeType ||
+    "PipelinePrimaryTopicReference" === nodeType ||
     "OptionalCallExpression" === nodeType ||
     "Import" === nodeType ||
     "DoExpression" === nodeType ||