diff --git a/.changeset/eleven-buckets-deny.md b/.changeset/eleven-buckets-deny.md
new file mode 100644
index 000000000000..e241e2cbb0cf
--- /dev/null
+++ b/.changeset/eleven-buckets-deny.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-static': patch
+---
+
+[breaking] Throws when correctly configured to run as a static site of a SPA
diff --git a/packages/adapter-static/index.js b/packages/adapter-static/index.js
index 812226860935..3d5d3d3aac98 100644
--- a/packages/adapter-static/index.js
+++ b/packages/adapter-static/index.js
@@ -14,8 +14,8 @@ export default function (options) {
 
 		async adapt(builder) {
 			if (!options?.fallback && !builder.config.kit.prerender.default) {
-				builder.log.warn(
-					'You should set `config.kit.prerender.default` to `true` if no fallback is specified'
+				throw Error(
+					'adapter-static requires `config.kit.prerender.default` to be `true` unless you set the `fallback: true` option to create a single-page app. See https://github.com/sveltejs/kit/tree/master/packages/adapter-static#spa-mode for more information'
 				);
 			}
 
diff --git a/packages/kit/test/prerendering/disabled/package.json b/packages/kit/test/prerendering/fallback/package.json
similarity index 100%
rename from packages/kit/test/prerendering/disabled/package.json
rename to packages/kit/test/prerendering/fallback/package.json
diff --git a/packages/kit/test/prerendering/disabled/src/app.html b/packages/kit/test/prerendering/fallback/src/app.html
similarity index 100%
rename from packages/kit/test/prerendering/disabled/src/app.html
rename to packages/kit/test/prerendering/fallback/src/app.html
diff --git a/packages/kit/test/prerendering/disabled/src/hooks.js b/packages/kit/test/prerendering/fallback/src/hooks.js
similarity index 100%
rename from packages/kit/test/prerendering/disabled/src/hooks.js
rename to packages/kit/test/prerendering/fallback/src/hooks.js
diff --git a/packages/kit/test/prerendering/disabled/src/routes/index.svelte b/packages/kit/test/prerendering/fallback/src/routes/index.svelte
similarity index 100%
rename from packages/kit/test/prerendering/disabled/src/routes/index.svelte
rename to packages/kit/test/prerendering/fallback/src/routes/index.svelte
diff --git a/packages/kit/test/prerendering/disabled/svelte.config.js b/packages/kit/test/prerendering/fallback/svelte.config.js
similarity index 81%
rename from packages/kit/test/prerendering/disabled/svelte.config.js
rename to packages/kit/test/prerendering/fallback/svelte.config.js
index 6b5a2c76d1db..f0e9b84e9631 100644
--- a/packages/kit/test/prerendering/disabled/svelte.config.js
+++ b/packages/kit/test/prerendering/fallback/svelte.config.js
@@ -3,7 +3,7 @@ import adapter from '../../../../adapter-static/index.js';
 /** @type {import('@sveltejs/kit').Config} */
 const config = {
 	kit: {
-		adapter: adapter(),
+		adapter: adapter({ fallback: '200.html' }),
 
 		prerender: {
 			enabled: false
diff --git a/packages/kit/test/prerendering/disabled/tsconfig.json b/packages/kit/test/prerendering/fallback/tsconfig.json
similarity index 100%
rename from packages/kit/test/prerendering/disabled/tsconfig.json
rename to packages/kit/test/prerendering/fallback/tsconfig.json
diff --git a/packages/kit/test/prerendering/disabled/vite.config.js b/packages/kit/test/prerendering/fallback/vite.config.js
similarity index 100%
rename from packages/kit/test/prerendering/disabled/vite.config.js
rename to packages/kit/test/prerendering/fallback/vite.config.js
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1a3172f7dff6..e399a14009a7 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -441,7 +441,7 @@ importers:
       uvu: 0.5.4
       vite: 3.0.0
 
-  packages/kit/test/prerendering/disabled:
+  packages/kit/test/prerendering/fallback:
     specifiers:
       '@sveltejs/kit': workspace:*
       svelte: ^3.48.0