diff --git a/.changeset/long-owls-eat.md b/.changeset/long-owls-eat.md
new file mode 100644
index 000000000000..2855a756c85e
--- /dev/null
+++ b/.changeset/long-owls-eat.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: correctly handle falsy values of style directives in SSR mode
diff --git a/packages/svelte/src/runtime/internal/ssr.js b/packages/svelte/src/runtime/internal/ssr.js
index 85d6f443df44..1917f0cfbc69 100644
--- a/packages/svelte/src/runtime/internal/ssr.js
+++ b/packages/svelte/src/runtime/internal/ssr.js
@@ -193,7 +193,7 @@ export function add_classes(classes) {
 /** @returns {string} */
 function style_object_to_string(style_object) {
 	return Object.keys(style_object)
-		.filter((key) => style_object[key])
+		.filter((key) => style_object[key] != null && style_object[key] !== '')
 		.map((key) => `${key}: ${escape_attribute_value(style_object[key])};`)
 		.join(' ');
 }
diff --git a/packages/svelte/test/runtime/samples/inline-style-directive-falsy-value/_config.js b/packages/svelte/test/runtime/samples/inline-style-directive-falsy-value/_config.js
new file mode 100644
index 000000000000..695b63f584ed
--- /dev/null
+++ b/packages/svelte/test/runtime/samples/inline-style-directive-falsy-value/_config.js
@@ -0,0 +1,9 @@
+export default {
+	html: `
+		<p style="--a: 0;"></p>
+		<p style="--b: false;"></p>
+		<p></p>
+		<p></p>
+		<p></p>
+	`
+};
diff --git a/packages/svelte/test/runtime/samples/inline-style-directive-falsy-value/main.svelte b/packages/svelte/test/runtime/samples/inline-style-directive-falsy-value/main.svelte
new file mode 100644
index 000000000000..bed3e7c0b5a5
--- /dev/null
+++ b/packages/svelte/test/runtime/samples/inline-style-directive-falsy-value/main.svelte
@@ -0,0 +1,5 @@
+<p style:--a={0}></p>
+<p style:--b={false}></p>
+<p style:--c=""></p>
+<p style:--d={undefined}></p>
+<p style:--e={null}></p>