diff --git a/src/signals/path-matchers.ts b/src/signals/path-matchers.ts
index 589bec77c5..b701f20fa3 100644
--- a/src/signals/path-matchers.ts
+++ b/src/signals/path-matchers.ts
@@ -66,7 +66,7 @@ function isGeneratedFileFrom(parts: NormalizedPath): boolean {
     // Source maps for every first-class JS/TS bundle extension. `.mjs`/`.cjs` are already
     // recognized code extensions (isCodeFile), so their bundlers' `.mjs.map` / `.cjs.map`
     // maps are generated output too — the same as `.js.map`.
-    /\.(js|jsx|mjs|cjs|ts|tsx|mts|cts|vue|svelte|astro|mdx|scss|sass|less|css)\.map$/.test(norm) ||
+    /\.(js|jsx|mjs|cjs|ts|tsx|mts|cts|vue|svelte|astro|mdx|scss|sass|less|html|css)\.map$/.test(norm) ||
     base === "worker-configuration.d.ts"
   );
 }
diff --git a/test/unit/path-matchers.test.ts b/test/unit/path-matchers.test.ts
index 50b5b793ca..1546a69303 100644
--- a/test/unit/path-matchers.test.ts
+++ b/test/unit/path-matchers.test.ts
@@ -38,7 +38,7 @@ describe("isGeneratedFile", () => {
     }
   });
 
-  it("matches source maps for every first-class JS/TS, MDX, Sass/SCSS/Less, and front-end framework extension", () => {
+  it("matches source maps for every first-class JS/TS, MDX, HTML, Sass/SCSS/Less, and front-end framework extension", () => {
     // `.mjs`/`.cjs` are recognized code extensions (isCodeFile), so their bundlers' source
     // maps are generated output too — the same as `.js.map` / `.tsx.map`.
     for (const path of [
@@ -54,6 +54,7 @@ describe("isGeneratedFile", () => {
       "dist/styles.scss.map",
       "dist/theme.sass.map",
       "dist/theme.less.map",
+      "dist/index.html.map",
     ]) {
       expect(isGeneratedFile(path)).toBe(true);
     }