diff --git a/src/backends/reference/backend.mk b/src/backends/reference/backend.mk
index f8169a6..7049279 100644
--- a/src/backends/reference/backend.mk
+++ b/src/backends/reference/backend.mk
@@ -41,6 +41,7 @@
         workloads/Lstm.cpp \
         workloads/LstmUtils.cpp \
         workloads/Concatenate.cpp \
+        workloads/MirrorPad.cpp \
         workloads/Pad.cpp \
         workloads/Pooling2d.cpp \
         workloads/PreluImpl.cpp \