diff --git a/.changeset/blue-badgers-play.md b/.changeset/blue-badgers-play.md
new file mode 100644
index 0000000000..e07d393568
--- /dev/null
+++ b/.changeset/blue-badgers-play.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: treat nullish expression as empty string
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
index bc79b76043..fb3f8df74b 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
@@ -77,7 +77,7 @@ export function build_template_chunk(
 				// If we have a single expression, then pass that in directly to possibly avoid doing
 				// extra work in the template_effect (instead we do the work in set_text).
 				if (evaluated.is_known) {
-					value = b.literal(evaluated.value);
+					value = b.literal((evaluated.value ?? '') + '');
 				}
 
 				return { value, has_state };
@@ -96,7 +96,7 @@ export function build_template_chunk(
 			}
 
 			if (evaluated.is_known) {
-				quasi.value.cooked += evaluated.value + '';
+				quasi.value.cooked += (evaluated.value ?? '') + '';
 			} else {
 				if (!evaluated.is_defined) {
 					// add `?? ''` where necessary
diff --git a/packages/svelte/tests/runtime-runes/samples/nullish-empty-string/_config.js b/packages/svelte/tests/runtime-runes/samples/nullish-empty-string/_config.js
new file mode 100644
index 0000000000..84e97e9735
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/nullish-empty-string/_config.js
@@ -0,0 +1,5 @@
+import { test } from '../../test';
+
+export default test({
+	html: '[]'
+});
diff --git a/packages/svelte/tests/runtime-runes/samples/nullish-empty-string/main.svelte b/packages/svelte/tests/runtime-runes/samples/nullish-empty-string/main.svelte
new file mode 100644
index 0000000000..efe39b91fe
--- /dev/null
+++ b/packages/svelte/tests/runtime-runes/samples/nullish-empty-string/main.svelte
@@ -0,0 +1 @@
+[{undefined ?? null}]
diff --git a/packages/svelte/tests/snapshot/samples/purity/_expected/client/index.svelte.js b/packages/svelte/tests/snapshot/samples/purity/_expected/client/index.svelte.js
index 5bc9766acf..f661dbc01d 100644
--- a/packages/svelte/tests/snapshot/samples/purity/_expected/client/index.svelte.js
+++ b/packages/svelte/tests/snapshot/samples/purity/_expected/client/index.svelte.js
@@ -8,7 +8,7 @@ export default function Purity($$anchor) {
 	var fragment = root();
 	var p = $.first_child(fragment);
 
-	p.textContent = 0;
+	p.textContent = '0';
 
 	var p_1 = $.sibling(p, 2);