diff --git a/src/drivers/px4fmu/fmu.cpp b/src/drivers/px4fmu/fmu.cpp
index e017a2388d..7c125d75a1 100644
--- a/src/drivers/px4fmu/fmu.cpp
+++ b/src/drivers/px4fmu/fmu.cpp
@@ -1717,7 +1717,7 @@ ssize_t
 PX4FMU::write(file *filp, const char *buffer, size_t len)
 {
 	unsigned count = len / 2;
-	uint16_t values[6];
+	uint16_t values[8];
 
 #ifdef CONFIG_ARCH_BOARD_AEROCORE