diff --git a/.changeset/tender-suits-melt.md b/.changeset/tender-suits-melt.md
new file mode 100644
index 00000000..4479c205
--- /dev/null
+++ b/.changeset/tender-suits-melt.md
@@ -0,0 +1,5 @@
+---
+'@gql.tada/cli-utils': patch
+---
+
+Fix generate-schema not forwarding single header
diff --git a/packages/cli-utils/src/index.ts b/packages/cli-utils/src/index.ts
index a2678aa7..176fa050 100644
--- a/packages/cli-utils/src/index.ts
+++ b/packages/cli-utils/src/index.ts
@@ -39,8 +39,10 @@ async function main() {
 
       let introspection: IntrospectionQuery;
       if (url) {
-        const headers = (Array.isArray(options.header) ? options.header : []).reduce(
+        const headers = (Array.isArray(options.header) ? options.header : [options.header]).reduce(
           (acc, item) => {
+            if (!item) return acc;
+
             const parts = item.split(':');
             return {
               ...acc,