diff --git a/boards/holybro/durandal-v1/nuttx-config/stackcheck/defconfig b/boards/holybro/durandal-v1/nuttx-config/stackcheck/defconfig
index b777335c75..d911196361 100644
--- a/boards/holybro/durandal-v1/nuttx-config/stackcheck/defconfig
+++ b/boards/holybro/durandal-v1/nuttx-config/stackcheck/defconfig
@@ -45,7 +45,7 @@ CONFIG_BOARD_RESET_ON_ASSERT=2
 CONFIG_BUILTIN=y
 CONFIG_C99_BOOL8=y
 CONFIG_CDCACM=y
-CONFIG_CDCACM_PRODUCTID=0x008b
+CONFIG_CDCACM_PRODUCTID=0x004b
 CONFIG_CDCACM_PRODUCTSTR="PX4 DurandalV1"
 CONFIG_CDCACM_RXBUFSIZE=600
 CONFIG_CDCACM_TXBUFSIZE=12000
diff --git a/platforms/nuttx/src/bootloader/lib/cdcacm.c b/platforms/nuttx/src/bootloader/lib/cdcacm.c
index 601fa9a97e..dbf20f8210 100644
--- a/platforms/nuttx/src/bootloader/lib/cdcacm.c
+++ b/platforms/nuttx/src/bootloader/lib/cdcacm.c
@@ -53,9 +53,9 @@ char *g_init = 0;
 #if defined(SERIAL_TRACE)
 int in = 0;
 int out = 0;
-// must be powere of 2 length
+// must be power of 2 length
 #define TRACE_SIZE      256
-#define TRACE_WRAP(f)   (f) &=(TRACE_SIZE-1)
+#define TRACE_WRAP(f)   ((f) &=(TRACE_SIZE-1))
 char in_trace[TRACE_SIZE];
 char out_trace[TRACE_SIZE];
 #endif