diff --git a/src/httpd.js.c b/src/httpd.js.c
index 6d29090e..597c9bcc 100644
--- a/src/httpd.js.c
+++ b/src/httpd.js.c
@@ -557,14 +557,11 @@ static bool _magic_bytes_match(const magic_bytes_t* magic, const uint8_t* actual
 	return true;
 }
 
-static JSValue _httpd_mime_type_from_magic_bytes(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
+static const char* _httpd_mime_type_from_magic_bytes_internal(const uint8_t* bytes, size_t size)
 {
-	JSValue result = JS_UNDEFINED;
-	size_t size = 0;
-	uint8_t* bytes = tf_util_try_get_array_buffer(context, &size, argv[0]);
+	const char* type = "application/binary";
 	if (bytes)
 	{
-
 		const magic_bytes_t k_magic_bytes[] = {
 			{
 				.type = "image/jpeg",
@@ -629,12 +626,19 @@ static JSValue _httpd_mime_type_from_magic_bytes(JSContext* context, JSValueCons
 		{
 			if (_magic_bytes_match(&k_magic_bytes[i], bytes, size))
 			{
-				result = JS_NewString(context, k_magic_bytes[i].type);
+				type = k_magic_bytes[i].type;
 				break;
 			}
 		}
 	}
-	return result;
+	return type;
+}
+
+static JSValue _httpd_mime_type_from_magic_bytes(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
+{
+	size_t size = 0;
+	uint8_t* bytes = tf_util_try_get_array_buffer(context, &size, argv[0]);
+	return JS_NewString(context, _httpd_mime_type_from_magic_bytes_internal(bytes, size));
 }
 
 static const char* _ext_to_content_type(const char* ext, bool use_fallback)
@@ -1046,6 +1050,7 @@ static void _httpd_endpoint_view_after_work(tf_ssb_t* ssb, int status, void* use
 	}
 	const char* headers[] = {
 		"Content-Security-Policy", "sandbox allow-downloads allow-top-navigation-by-user-activation",
+		"Content-Type", view->data ? _httpd_mime_type_from_magic_bytes_internal(view->data, view->size) : "text/plain",
 		filename ? "Content-Disposition" : NULL, filename ? content_disposition : NULL,
 	};
 	int count = filename ? tf_countof(headers) / 2 : (tf_countof(headers) / 2 - 1);