diff --git a/src/backends/reference/backend.mk b/src/backends/reference/backend.mk
index 3ee0791..acaedc9 100644
--- a/src/backends/reference/backend.mk
+++ b/src/backends/reference/backend.mk
@@ -16,6 +16,7 @@
         workloads/Broadcast.cpp \
         workloads/ConvImpl.cpp \
         workloads/Debug.cpp \
+        workloads/DetectionPostProcess.cpp \
         workloads/ElementwiseFunction.cpp \
         workloads/FullyConnected.cpp \
         workloads/Gather.cpp \
@@ -37,6 +38,8 @@
         workloads/RefDebugWorkload.cpp \
         workloads/RefDepthwiseConvolution2dFloat32Workload.cpp \
         workloads/RefDepthwiseConvolution2dUint8Workload.cpp \
+        workloads/RefDetectionPostProcessFloat32Workload.cpp \
+        workloads/RefDetectionPostProcessUint8Workload.cpp \
         workloads/RefElementwiseWorkload.cpp \
         workloads/RefFakeQuantizationFloat32Workload.cpp \
         workloads/RefFloorFloat32Workload.cpp \