diff --git a/src/libcamera/pipeline/virtual/image_frame_generator.cpp b/src/libcamera/pipeline/virtual/image_frame_generator.cpp
index 277efbb09..d1545b5d9 100644
--- a/src/libcamera/pipeline/virtual/image_frame_generator.cpp
+++ b/src/libcamera/pipeline/virtual/image_frame_generator.cpp
@@ -129,7 +129,7 @@ int ImageFrameGenerator::generateFrame(const Size &size, const FrameBuffer *buff
 
 	MappedFrameBuffer mappedFrameBuffer(buffer, MappedFrameBuffer::MapFlag::Write);
 
-	auto planes = mappedFrameBuffer.planes();
+	const auto &planes = mappedFrameBuffer.planes();
 
 	/* Loop only around the number of images available */
 	frameIndex_ %= imageFrameDatas_.size();
diff --git a/src/libcamera/pipeline/virtual/test_pattern_generator.cpp b/src/libcamera/pipeline/virtual/test_pattern_generator.cpp
index 7bc2b338c..47d341919 100644
--- a/src/libcamera/pipeline/virtual/test_pattern_generator.cpp
+++ b/src/libcamera/pipeline/virtual/test_pattern_generator.cpp
@@ -25,7 +25,7 @@ int TestPatternGenerator::generateFrame(const Size &size,
 	MappedFrameBuffer mappedFrameBuffer(buffer,
 					    MappedFrameBuffer::MapFlag::Write);
 
-	auto planes = mappedFrameBuffer.planes();
+	const auto &planes = mappedFrameBuffer.planes();
 
 	shiftLeft(size);
 
diff --git a/src/libcamera/pipeline/virtual/virtual.cpp b/src/libcamera/pipeline/virtual/virtual.cpp
index 1b7cd5cb3..3126bdd7d 100644
--- a/src/libcamera/pipeline/virtual/virtual.cpp
+++ b/src/libcamera/pipeline/virtual/virtual.cpp
@@ -275,8 +275,7 @@ int PipelineHandlerVirtual::exportFrameBuffers([[maybe_unused]] Camera *camera,
 		return -ENOBUFS;
 
 	const StreamConfiguration &config = stream->configuration();
-
-	auto info = PixelFormatInfo::info(config.pixelFormat);
+	const PixelFormatInfo &info = PixelFormatInfo::info(config.pixelFormat);
 
 	std::vector<unsigned int> planeSizes;
 	for (size_t i = 0; i < info.planes.size(); ++i)