diff --git a/src/compiler/compile/Component.ts b/src/compiler/compile/Component.ts
index 5aeff019bd7e..355ad0c423b9 100644
--- a/src/compiler/compile/Component.ts
+++ b/src/compiler/compile/Component.ts
@@ -72,7 +72,7 @@ export default class Component {
 	stats: Stats;
 	warnings: Warning[];
 	ignores: Set<string>;
-	ignore_stack: Set<string>[] = [];
+	ignore_stack: Array<Set<string>> = [];
 
 	ast: Ast;
 	source: string;
diff --git a/src/compiler/compile/render_dom/wrappers/Slot.ts b/src/compiler/compile/render_dom/wrappers/Slot.ts
index 4dd23277fb19..3585d273586d 100644
--- a/src/compiler/compile/render_dom/wrappers/Slot.ts
+++ b/src/compiler/compile/render_dom/wrappers/Slot.ts
@@ -84,6 +84,7 @@ export default class SlotWrapper extends Wrapper {
 				});
 
 				const dynamic_dependencies = Array.from(attribute.dependencies).filter(name => {
+					if (this.node.scope.is_let(name)) return true;
 					const variable = renderer.component.var_lookup.get(name);
 					return is_dynamic(variable);
 				});
@@ -105,7 +106,7 @@ export default class SlotWrapper extends Wrapper {
 		}
 
 		const slot = block.get_unique_name(`${sanitize(slot_name)}_slot`);
-		const slot_definition = block.get_unique_name(`${sanitize(slot_name)}_slot`);
+		const slot_definition = block.get_unique_name(`${sanitize(slot_name)}_slot_template`);
 
 		block.builders.init.add_block(deindent`
 			const ${slot_definition} = ctx.$$slots${quote_prop_if_necessary(slot_name)};
@@ -162,6 +163,7 @@ export default class SlotWrapper extends Wrapper {
 
 		const dynamic_dependencies = Array.from(this.dependencies).filter(name => {
 			if (name === '$$scope') return true;
+			if (this.node.scope.is_let(name)) return true;
 			const variable = renderer.component.var_lookup.get(name);
 			return is_dynamic(variable);
 		});
@@ -171,7 +173,10 @@ export default class SlotWrapper extends Wrapper {
 
 		block.builders.update.add_block(deindent`
 			if (${slot} && ${slot}.p && ${update_conditions}) {
-				${slot}.p(@get_slot_changes(${slot_definition}, ctx, changed, ${get_slot_changes}), @get_slot_context(${slot_definition}, ctx, ${get_slot_context}));
+				${slot}.p(
+					@get_slot_changes(${slot_definition}, ctx, changed, ${get_slot_changes}),
+					@get_slot_context(${slot_definition}, ctx, ${get_slot_context})
+				);
 			}
 		`);
 
diff --git a/test/runtime/samples/component-slot-let-f/A.svelte b/test/runtime/samples/component-slot-let-f/A.svelte
new file mode 100644
index 000000000000..79428b13ecd8
--- /dev/null
+++ b/test/runtime/samples/component-slot-let-f/A.svelte
@@ -0,0 +1,9 @@
+<script>
+	import B from './B.svelte';
+	export let x;
+</script>
+
+<B {x} let:reflected>
+	<span>{reflected}</span>
+	<slot {reflected} />
+</B>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-let-f/B.svelte b/test/runtime/samples/component-slot-let-f/B.svelte
new file mode 100644
index 000000000000..7a8dc596ba63
--- /dev/null
+++ b/test/runtime/samples/component-slot-let-f/B.svelte
@@ -0,0 +1,5 @@
+<script>
+	export let x;
+</script>
+
+<slot reflected={x}/>
\ No newline at end of file
diff --git a/test/runtime/samples/component-slot-let-f/_config.js b/test/runtime/samples/component-slot-let-f/_config.js
new file mode 100644
index 000000000000..74de38be02cc
--- /dev/null
+++ b/test/runtime/samples/component-slot-let-f/_config.js
@@ -0,0 +1,15 @@
+export default {
+	html: `
+		<span>1</span>
+		<span>1</span>
+	`,
+
+	async test({ assert, target, component }) {
+		component.x = 2;
+
+		assert.htmlEqual(target.innerHTML, `
+			<span>2</span>
+			<span>2</span>
+		`);
+	}
+};
diff --git a/test/runtime/samples/component-slot-let-f/main.svelte b/test/runtime/samples/component-slot-let-f/main.svelte
new file mode 100644
index 000000000000..71362d9b4e2b
--- /dev/null
+++ b/test/runtime/samples/component-slot-let-f/main.svelte
@@ -0,0 +1,8 @@
+<script>
+	import A from './A.svelte';
+	export let x = 1;
+</script>
+
+<A {x} let:reflected>
+	<span>{reflected}</span>
+</A>
\ No newline at end of file