diff --git a/unittests/CMakeLists.txt b/unittests/CMakeLists.txt
index 2a628bb1f1..c2e11ea37a 100644
--- a/unittests/CMakeLists.txt
+++ b/unittests/CMakeLists.txt
@@ -98,7 +98,6 @@ add_library(px4_platform
 			${PX4_SRC}/platforms/posix/px4_layer/px4_posix_impl.cpp
 			${PX4_SRC}/platforms/posix/px4_layer/px4_posix_tasks.cpp
 			${PX4_SRC}/platforms/posix/px4_layer/px4_sem.cpp
-			${PX4_SRC}/platforms/posix/px4_layer/shmem_posix.c
 			${PX4_SRC}/platforms/posix/work_queue/dq_addlast.c
 			${PX4_SRC}/platforms/posix/work_queue/dq_rem.c
 			${PX4_SRC}/platforms/posix/work_queue/dq_remfirst.c