diff --git a/src/http/input/identifier/OriginalUrlExtractor.ts b/src/http/input/identifier/OriginalUrlExtractor.ts
index 7ae929294..72b5c2114 100644
--- a/src/http/input/identifier/OriginalUrlExtractor.ts
+++ b/src/http/input/identifier/OriginalUrlExtractor.ts
@@ -45,12 +45,11 @@ export class OriginalUrlExtractor extends TargetExtractor {
     }
 
     // URL object applies punycode encoding to domain
-    const base = `${protocol}://${host}`;
-    const originalUrl = new URL(toCanonicalUriPath(url), base);
-
-    // Drop the query string if requested
-    if (!this.includeQueryString) {
-      originalUrl.search = '';
+    const originalUrl = new URL(`${protocol}://${host}`);
+    const [ , pathname, search ] = /^([^?]*)(.*)/u.exec(toCanonicalUriPath(url))!;
+    originalUrl.pathname = pathname;
+    if (this.includeQueryString && search) {
+      originalUrl.search = search;
     }
 
     return { path: originalUrl.href };
diff --git a/test/unit/http/input/identifier/OriginalUrlExtractor.test.ts b/test/unit/http/input/identifier/OriginalUrlExtractor.test.ts
index c60668130..be4fc75cf 100644
--- a/test/unit/http/input/identifier/OriginalUrlExtractor.test.ts
+++ b/test/unit/http/input/identifier/OriginalUrlExtractor.test.ts
@@ -32,6 +32,12 @@ describe('A OriginalUrlExtractor', (): void => {
       .resolves.toEqual({ path: 'http://test.com/url' });
   });
 
+  it('returns an input URL with multiple leading slashes.', async(): Promise<void> => {
+    const noQuery = new OriginalUrlExtractor({ includeQueryString: true });
+    await expect(noQuery.handle({ request: { url: '///url?abc=def&xyz', headers: { host: 'test.com' }} as any }))
+      .resolves.toEqual({ path: 'http://test.com///url?abc=def&xyz' });
+  });
+
   it('drops the query string when includeQueryString is set to false.', async(): Promise<void> => {
     await expect(extractor.handle({ request: { url: '/url?abc=def&xyz', headers: { host: 'test.com' }} as any }))
       .resolves.toEqual({ path: 'http://test.com/url?abc=def&xyz' });