diff --git a/CHANGELOG.md b/CHANGELOG.md
index 84552c9d2b51..a045c1591774 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Svelte changelog
 
+## Unreleased
+
+* Fix removal of lone `:host` selectors ([#5982](https://github.com/sveltejs/svelte/issues/5982))
+
 ## 3.32.2
 
 * Fix unnecessary additional invalidation with `<Component bind:prop={obj.foo}/>` ([#3075](https://github.com/sveltejs/svelte/issues/3075), [#4447](https://github.com/sveltejs/svelte/issues/4447), [#5555](https://github.com/sveltejs/svelte/issues/5555))
diff --git a/src/compiler/compile/css/Selector.ts b/src/compiler/compile/css/Selector.ts
index 3c9f453c8d6d..6d0e7c50032a 100644
--- a/src/compiler/compile/css/Selector.ts
+++ b/src/compiler/compile/css/Selector.ts
@@ -44,7 +44,10 @@ export default class Selector {
 		}
 
 		this.local_blocks = this.blocks.slice(0, i);
-		this.used = this.local_blocks.length === 0;
+
+		const host_only = this.blocks.length === 1 && this.blocks[0].host;
+
+		this.used = this.local_blocks.length === 0 || host_only;
 	}
 
 	apply(node: Element) {
diff --git a/test/css/samples/host/expected.css b/test/css/samples/host/expected.css
index 28683691c0bc..d848082f5e2e 100644
--- a/test/css/samples/host/expected.css
+++ b/test/css/samples/host/expected.css
@@ -1 +1 @@
-:host h1.svelte-xyz{color:red}:host>h1.svelte-xyz{color:red}:host>.svelte-xyz{color:red}:host span.svelte-xyz{color:red}
\ No newline at end of file
+:host h1.svelte-xyz{color:red}:host>h1.svelte-xyz{color:red}:host>.svelte-xyz{color:red}:host span.svelte-xyz{color:red}:host{color:red}
\ No newline at end of file
diff --git a/test/css/samples/host/input.svelte b/test/css/samples/host/input.svelte
index 4c1efcd98348..85db1617ef49 100644
--- a/test/css/samples/host/input.svelte
+++ b/test/css/samples/host/input.svelte
@@ -18,6 +18,10 @@
 	:host > span {
 		color: red;
 	}
+
+  :host {
+    color: red;
+  }
 </style>
 
 <h1>Hello!</h1>