diff --git a/.changeset/tough-insects-joke.md b/.changeset/tough-insects-joke.md
new file mode 100644
index 000000000..de091512a
--- /dev/null
+++ b/.changeset/tough-insects-joke.md
@@ -0,0 +1,5 @@
+---
+'houdini': patch
+---
+
+Fix error bug JSON response might get treated as non-JSON if it includes `charset` or `boundary`
diff --git a/packages/houdini/src/runtime/client/plugins/fetch.ts b/packages/houdini/src/runtime/client/plugins/fetch.ts
index 4809e1e94..42489f1dd 100644
--- a/packages/houdini/src/runtime/client/plugins/fetch.ts
+++ b/packages/houdini/src/runtime/client/plugins/fetch.ts
@@ -97,8 +97,8 @@ const defaultFetch = (
 		// Avoid parsing the response if it's not JSON, as that will throw a SyntaxError
 		if (
 			!result.ok &&
-			result.headers.get('content-type') !== 'application/json' &&
-			result.headers.get('content-type') !== 'application/graphql+json'
+			!result.headers.get('content-type')?.startsWith('application/json') &&
+			!result.headers.get('content-type')?.startsWith('application/graphql+json')
 		) {
 			throw new Error(
 				`Failed to fetch: server returned invalid response with error ${result.status}: ${result.statusText}`