diff --git a/src/compiler/compile/css/Selector.ts b/src/compiler/compile/css/Selector.ts
index c141f6b481..46e9b4c4f0 100644
--- a/src/compiler/compile/css/Selector.ts
+++ b/src/compiler/compile/css/Selector.ts
@@ -406,7 +406,7 @@ function get_possible_element_siblings(node: INode, adjacent_only: boolean): Map
 	let prev: INode = node;
 	while (prev = prev.prev) {
 		if (prev.type === 'Element') {
-			if (!prev.attributes.find(attr => attr.name.toLowerCase() === 'slot')) {
+			if (!prev.attributes.find(attr => attr.type === 'Attribute' && attr.name.toLowerCase() === 'slot')) {
 				result.set(prev, NodeExist.Definitely);
 			}
 
diff --git a/test/css/samples/siblings-combinator-with-spread/_config.js b/test/css/samples/siblings-combinator-with-spread/_config.js
new file mode 100644
index 0000000000..c81f1a9f82
--- /dev/null
+++ b/test/css/samples/siblings-combinator-with-spread/_config.js
@@ -0,0 +1,3 @@
+export default {
+	warnings: []
+};
diff --git a/test/css/samples/siblings-combinator-with-spread/expected.css b/test/css/samples/siblings-combinator-with-spread/expected.css
new file mode 100644
index 0000000000..aacf6e7db5
--- /dev/null
+++ b/test/css/samples/siblings-combinator-with-spread/expected.css
@@ -0,0 +1 @@
+input.svelte-xyz:focus+div.svelte-xyz{color:red}input.svelte-xyz:focus~div.svelte-xyz{color:red}
\ No newline at end of file
diff --git a/test/css/samples/siblings-combinator-with-spread/expected.html b/test/css/samples/siblings-combinator-with-spread/expected.html
new file mode 100644
index 0000000000..d732739701
--- /dev/null
+++ b/test/css/samples/siblings-combinator-with-spread/expected.html
@@ -0,0 +1,2 @@
+<input placeholder="Text" class="svelte-xyz">
+<div class="svelte-xyz">Should be red, when input is focused</div>
\ No newline at end of file
diff --git a/test/css/samples/siblings-combinator-with-spread/input.svelte b/test/css/samples/siblings-combinator-with-spread/input.svelte
new file mode 100644
index 0000000000..fbbd124bcc
--- /dev/null
+++ b/test/css/samples/siblings-combinator-with-spread/input.svelte
@@ -0,0 +1,11 @@
+<script>
+	const test = { placeholder: 'Text' }
+</script>
+
+<style>
+	input:focus + div { color: red; }
+	input:focus ~ div { color: red; }
+</style>
+
+<input {...test}>
+<div>Should be red, when input is focused</div>
\ No newline at end of file