diff --git a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
index 2a917455500f..6c6d31f78c88 100644
--- a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
+++ b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
@@ -1312,9 +1312,14 @@ void RPiCameraData::statsMetadataComplete(uint32_t bufferId, const ControlList &
 
 	handleStreamBuffer(buffer, &isp_[Isp::Stats]);
 
-	/* Fill the Request metadata buffer with what the IPA has provided */
+	/*
+	 * Add to the Request metadata buffer what the IPA has provided.
+	 *
+	 * Do not overwrite controls set by the pipeline handler, for example
+	 * SensorTimestamp.
+	 */
 	Request *request = requestQueue_.front();
-	request->metadata() = controls;
+	request->metadata().merge(const_cast<ControlList &>(controls));
 
 	/*
 	 * Also update the ScalerCrop in the metadata with what we actually