diff --git a/.changeset/modern-students-give.md b/.changeset/modern-students-give.md
new file mode 100644
index 00000000..c4e83ffc
--- /dev/null
+++ b/.changeset/modern-students-give.md
@@ -0,0 +1,5 @@
+---
+'microbundle': patch
+---
+
+Fixing a bug that would cause a CSS file to be generated to match each JS build output
diff --git a/src/index.js b/src/index.js
index 30244f05..6ec0238a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -458,6 +458,7 @@ function createConfig(options, entry, format, writeMeta) {
 						// only write out CSS for the first bundle (avoids pointless extra files):
 						inject: false,
 						extract:
+							!!writeMeta &&
 							options.css !== 'inline' &&
 							options.output.replace(
 								/(\.(umd|cjs|es|m))?\.(mjs|[tj]sx?)$/,