diff --git a/src/libcamera/include/pipeline_handler.h b/src/libcamera/include/pipeline_handler.h
index b6cbd3ba..33b820e7 100644
--- a/src/libcamera/include/pipeline_handler.h
+++ b/src/libcamera/include/pipeline_handler.h
@@ -26,6 +26,7 @@ class PipelineHandler;
 class Request;
 class Stream;
 class StreamConfiguration;
+class StreamUsage;
 
 class CameraData
 {