diff --git a/src/modules/vtol_att_control/CMakeLists.txt b/src/modules/vtol_att_control/CMakeLists.txt
index 7e424e55b6..24b2b2c6f0 100644
--- a/src/modules/vtol_att_control/CMakeLists.txt
+++ b/src/modules/vtol_att_control/CMakeLists.txt
@@ -33,7 +33,8 @@
 px4_add_module(
 	MODULE modules__vtol_att_control
 	MAIN vtol_att_control
-	COMPILE_FLAGS
+	STACK_MAIN 1300
+	COMPILE_FLAGS -Os
 	SRCS
 		vtol_att_control_main.cpp
 		tiltrotor.cpp
diff --git a/src/modules/vtol_att_control/vtol_att_control_main.cpp b/src/modules/vtol_att_control/vtol_att_control_main.cpp
index 890a09a840..3e86813861 100644
--- a/src/modules/vtol_att_control/vtol_att_control_main.cpp
+++ b/src/modules/vtol_att_control/vtol_att_control_main.cpp
@@ -830,7 +830,7 @@ VtolAttitudeControl::start()
 	_control_task = px4_task_spawn_cmd("vtol_att_control",
 					   SCHED_DEFAULT,
 					   SCHED_PRIORITY_MAX - 10,
-					   2048,
+					   1100,
 					   (px4_main_t)&VtolAttitudeControl::task_main_trampoline,
 					   nullptr);