diff --git a/boards/px4/fmu-v5/nuttx-config/optimized/defconfig b/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
index 08051518c1..3411696770 100644
--- a/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
@@ -83,7 +83,7 @@ CONFIG_I2C_RESET=y
 CONFIG_IDLETHREAD_STACKSIZE=750
 CONFIG_LIBC_FLOATINGPOINT=y
 CONFIG_LIBC_LONG_LONG=y
-CONFIG_LIBC_STRERROR=y
+CONFIG_LIBC_STRERROR=n
 CONFIG_MAX_TASKS=64
 CONFIG_MEMSET_64BIT=y
 CONFIG_MEMSET_OPTSPEED=y