diff --git a/spec/engine.ts b/spec/engine.ts
index 0617ca2..ff46428 100644
--- a/spec/engine.ts
+++ b/spec/engine.ts
@@ -30,6 +30,14 @@ describe ('Search engine', () => {
     expect(results1).to.deep.equal(results2)
   })
 
+  it('the "default" version works just like "master"', () => {
+    const results1 = search(lunrIndex, files, 'backup', undefined, 'master')
+    const results2 = search(lunrIndex, files, 'backup', undefined, 'default')
+    expect(results1.length).to.equal(50)
+    expect(results2.length).to.equal(50)
+    expect(results1).to.deep.equal(results2)
+  })
+
   it('can be filtered by version', () => {
     const results = search(lunrIndex, files, 'backup', undefined, '0.1')
     expect(results.length).to.equal(7)
diff --git a/src/engine.ts b/src/engine.ts
index 78b2109..f6c5975 100644
--- a/src/engine.ts
+++ b/src/engine.ts
@@ -6,7 +6,7 @@ export type FileRepository = { [ref: string]: SearchResult }
 
 /**
  * Performs the actual search against the Lunr index.
- * This function takes a "version" parameter; if this parameter is "master" or "main", then all search
+ * This function takes a "version" parameter; if this parameter is "master", "main", or "default", then all search
  * results are included in the response. If a different value is provided, only those values are returned.
  * @param lunrIndex The Lunr.js index
  * @param files The repository of files
@@ -25,7 +25,7 @@ export function search(lunrIndex: lunr.Index, files: FileRepository, query: stri
     .filter((result: SearchResult) => {
       // This "or" statement short-circuits the evaluation: if "master" or "main" are mentioned,
       // the result is included; otherwise, if the version coincides, it is included.
-      if (version === 'master' || version === 'main' || result.version === version) {
+      if (version === 'master' || version === 'main' || version === 'default' || result.version === version) {
         return result
       }
     })