diff --git a/src/platforms/posix/px4_layer/CMakeLists.txt b/src/platforms/posix/px4_layer/CMakeLists.txt
index d80b6083ad..0ae88b6888 100644
--- a/src/platforms/posix/px4_layer/CMakeLists.txt
+++ b/src/platforms/posix/px4_layer/CMakeLists.txt
@@ -43,6 +43,7 @@ px4_add_module(
 	MODULE platforms__posix__px4_layer
 	COMPILE_FLAGS
 		-Os
+		-Wno-packed
 	SRCS
 		px4_posix_impl.cpp
 		px4_posix_tasks.cpp