diff --git a/include/libcamera/camera.h b/include/libcamera/camera.h
index 272c12c3c473..53c32afa23a5 100644
--- a/include/libcamera/camera.h
+++ b/include/libcamera/camera.h
@@ -39,7 +39,7 @@ public:
 
 	virtual ~CameraConfiguration();
 
-	void addConfiguration(const StreamConfiguration &cfg);
+	int addConfiguration(const StreamConfiguration &cfg);
 	virtual Status validate() = 0;
 
 	StreamConfiguration &at(unsigned int index);
diff --git a/src/libcamera/camera.cpp b/src/libcamera/camera.cpp
index 4a9c19c33cfb..9a8923620e24 100644
--- a/src/libcamera/camera.cpp
+++ b/src/libcamera/camera.cpp
@@ -104,10 +104,13 @@ CameraConfiguration::~CameraConfiguration()
 /**
  * \brief Add a stream configuration to the camera configuration
  * \param[in] cfg The stream configuration
+ * \return The index of the newly added stream configuration
  */
-void CameraConfiguration::addConfiguration(const StreamConfiguration &cfg)
+int CameraConfiguration::addConfiguration(const StreamConfiguration &cfg)
 {
 	config_.push_back(cfg);
+
+	return config_.size() - 1;
 }
 
 /**