diff --git a/src/libcamera/software_isp/software_isp.cpp b/src/libcamera/software_isp/software_isp.cpp
index b5eab670..8535db90 100644
--- a/src/libcamera/software_isp/software_isp.cpp
+++ b/src/libcamera/software_isp/software_isp.cpp
@@ -66,7 +66,8 @@ SoftwareIsp::SoftwareIsp(PipelineHandler *pipe, const CameraSensor *sensor)
 	: debayerParams_{ DebayerParams::kGain10, DebayerParams::kGain10,
 			  DebayerParams::kGain10, 0.5f, 0 },
 	  dmaHeap_(DmaBufAllocator::DmaBufAllocatorFlag::CmaHeap |
-		   DmaBufAllocator::DmaBufAllocatorFlag::SystemHeap)
+		   DmaBufAllocator::DmaBufAllocatorFlag::SystemHeap |
+		   DmaBufAllocator::DmaBufAllocatorFlag::UDmaBuf)
 {
 	if (!dmaHeap_.isValid()) {
 		LOG(SoftwareIsp, Error) << "Failed to create DmaBufAllocator object";