diff --git a/test/file-descriptor.cpp b/test/file-descriptor.cpp
index 3e5e8800..e467f3a7 100644
--- a/test/file-descriptor.cpp
+++ b/test/file-descriptor.cpp
@@ -14,6 +14,7 @@
 #include <libcamera/file_descriptor.h>
 
 #include "test.h"
+#include "utils.h"
 
 using namespace libcamera;
 using namespace std;