diff --git a/boards/px4/fmu-v4/nuttx-config/optimized/defconfig b/boards/px4/fmu-v4/nuttx-config/optimized/defconfig
index 158727e56f..6af390f514 100644
--- a/boards/px4/fmu-v4/nuttx-config/optimized/defconfig
+++ b/boards/px4/fmu-v4/nuttx-config/optimized/defconfig
@@ -127,6 +127,7 @@ CONFIG_SCHED_HPWORK=y
 CONFIG_SCHED_HPWORKPRIORITY=249
 CONFIG_SCHED_HPWORKSTACKSIZE=1280
 CONFIG_SCHED_INSTRUMENTATION=y
+CONFIG_SCHED_INSTRUMENTATION_EXTERNAL=y
 CONFIG_SCHED_LPWORK=y
 CONFIG_SCHED_LPWORKPRIORITY=50
 CONFIG_SCHED_LPWORKSTACKSIZE=1632