diff --git a/src/compile/nodes/InlineComponent.ts b/src/compile/nodes/InlineComponent.ts
index 28c7b2594e..7ba476e21d 100644
--- a/src/compile/nodes/InlineComponent.ts
+++ b/src/compile/nodes/InlineComponent.ts
@@ -42,6 +42,13 @@ export default class InlineComponent extends Node {
 					});
 
 				case 'Attribute':
+					if (node.name === 'slot') {
+						component.error(node, {
+							code: `invalid-prop`,
+							message: `'slot' is reserved for future use in named slots`
+						});
+					}
+					// fallthrough
 				case 'Spread':
 					this.attributes.push(new Attribute(component, this, scope, node));
 					break;
diff --git a/test/validator/samples/prop-slot/errors.json b/test/validator/samples/prop-slot/errors.json
new file mode 100644
index 0000000000..01e864b542
--- /dev/null
+++ b/test/validator/samples/prop-slot/errors.json
@@ -0,0 +1,15 @@
+[{
+	"code": "invalid-prop",
+	"message": "'slot' is reserved for future use in named slots",
+	"start": {
+		"line": 5,
+		"column": 8,
+		"character": 65
+	},
+	"end": {
+		"line": 5,
+		"column": 18,
+		"character": 75
+	},
+	"pos": 65
+}]
diff --git a/test/validator/samples/prop-slot/input.html b/test/validator/samples/prop-slot/input.html
new file mode 100644
index 0000000000..6ce1b6dcce
--- /dev/null
+++ b/test/validator/samples/prop-slot/input.html
@@ -0,0 +1,5 @@
+<script>
+	import Widget from './Widget.html';
+</script>
+
+<Widget slot='foo'/>