diff --git a/lib/compiler/passes/generate-js.js b/lib/compiler/passes/generate-js.js
index ede5581c..bd919d20 100644
--- a/lib/compiler/passes/generate-js.js
+++ b/lib/compiler/passes/generate-js.js
@@ -86,7 +86,8 @@ function wrapInSourceNode(prefix, chunk, location, suffix, name) {
 }
 
 /**
- * @typedef {PEG.SourceArray} SourceArray
+ * @typedef {string|SourceNode|SARecurse} SourceArray
+ * @typedef {SourceArray[]} SARecurse
  *
  * @typedef {PEG.SourceBuildOptions<PEG.SourceOutputs>} SourceBuildOptions
  * @typedef {object} ExtraOptions
diff --git a/lib/peg.d.ts b/lib/peg.d.ts
index 8615b00c..68a08c78 100644
--- a/lib/peg.d.ts
+++ b/lib/peg.d.ts
@@ -1289,8 +1289,6 @@ export type SourceBuildOptions<Output extends SourceOutputs = "source">
   | OutputFormatGlobals<Output>
   | OutputFormatUmd<Output>;
 
-export type SourceArray = SourceArray[] | (SourceNode | string);
-
 /**
  * Returns a generated parser object.
  *