diff --git a/.changeset/sour-suits-fail.md b/.changeset/sour-suits-fail.md
new file mode 100644
index 00000000..deca0e65
--- /dev/null
+++ b/.changeset/sour-suits-fail.md
@@ -0,0 +1,5 @@
+---
+"vinxi": patch
+---
+
+fix missing null check on css exclusion
diff --git a/packages/vinxi/lib/manifest/collect-styles.js b/packages/vinxi/lib/manifest/collect-styles.js
index d86f74c8..64efce59 100644
--- a/packages/vinxi/lib/manifest/collect-styles.js
+++ b/packages/vinxi/lib/manifest/collect-styles.js
@@ -100,7 +100,7 @@ async function findDeps(vite, node, deps, ssr) {
 
 	if (
 		node.url.endsWith(".css") ||
-		node.transformResult?.map?.sourcesContent.some((code) => code.match(IGNORE_COMMENT_REGEXP))
+		node.transformResult?.map?.sourcesContent?.some((code) => code.match(IGNORE_COMMENT_REGEXP))
 	) {
 		return;
 	}