diff --git a/src/server-side-rendering/register.js b/src/server-side-rendering/register.js
index bb4ea61e7b..d50157140c 100644
--- a/src/server-side-rendering/register.js
+++ b/src/server-side-rendering/register.js
@@ -26,10 +26,14 @@ function _deregister(extension) {
 
 function _register(extension) {
 	require.extensions[extension] = function(module, filename) {
+		const name = path.basename(filename)
+			.slice(0, -path.extname(filename).length)
+			.replace(/^\d/, '_$&')
+			.replace(/[^a-zA-Z0-9_$]/g, '');
+
 		const options = Object.assign({}, compileOptions, {
 			filename,
-			name: capitalise(path.basename(filename)
-				.replace(new RegExp(`${extension.replace('.', '\\.')}$`), '')),
+			name: capitalise(name),
 			generate: 'ssr'
 		});
 
diff --git a/test/helpers.js b/test/helpers.js
index cc90e1f9bd..caf78894ce 100644
--- a/test/helpers.js
+++ b/test/helpers.js
@@ -175,11 +175,17 @@ function capitalise(str) {
 export function showOutput(cwd, options = {}, s = svelte) {
 	glob.sync('**/*.html', { cwd }).forEach(file => {
 		if (file[0] === '_') return;
+
+		const name = path.basename(file)
+			.slice(0, -path.extname(file).length)
+			.replace(/^\d/, '_$&')
+			.replace(/[^a-zA-Z0-9_$]/g, '');
+
 		const { code } = s.compile(
 			fs.readFileSync(`${cwd}/${file}`, 'utf-8'),
 			Object.assign(options, {
 				filename: file,
-				name: capitalise(path.basename(file).replace(/\.html$/, ''))
+				name: capitalise(name)
 			})
 		);
 
diff --git a/test/server-side-rendering/samples/sanitize-name/:foo.html b/test/server-side-rendering/samples/sanitize-name/:foo.html
new file mode 100644
index 0000000000..5ed8b34a53
--- /dev/null
+++ b/test/server-side-rendering/samples/sanitize-name/:foo.html
@@ -0,0 +1 @@
+<p>foo!</p>
\ No newline at end of file
diff --git a/test/server-side-rendering/samples/sanitize-name/_expected.html b/test/server-side-rendering/samples/sanitize-name/_expected.html
new file mode 100644
index 0000000000..5ed8b34a53
--- /dev/null
+++ b/test/server-side-rendering/samples/sanitize-name/_expected.html
@@ -0,0 +1 @@
+<p>foo!</p>
\ No newline at end of file
diff --git a/test/server-side-rendering/samples/sanitize-name/main.html b/test/server-side-rendering/samples/sanitize-name/main.html
new file mode 100644
index 0000000000..04e387bcfe
--- /dev/null
+++ b/test/server-side-rendering/samples/sanitize-name/main.html
@@ -0,0 +1,9 @@
+<Foo/>
+
+<script>
+	import Foo from './:foo.html';
+
+	export default {
+		components: { Foo }
+	};
+</script>
\ No newline at end of file