diff --git a/config/examples/lpc54606j512.config b/config/examples/lpc54606j512.config
index 168851be..ed3dc809 100644
--- a/config/examples/lpc54606j512.config
+++ b/config/examples/lpc54606j512.config
@@ -13,7 +13,7 @@ NO_ASM?=0
 EXT_FLASH?=0
 SPI_FLASH?=0
 ALLOW_DOWNGRADE?=0
-NVM_FLASH_WRITEONCE?=1
+NVM_FLASH_WRITEONCE?=0
 WOLFBOOT_VERSION?=0
 V?=0
 SPMATH?=1
diff --git a/hal/lpc.c b/hal/lpc.c
index f998097b..805aaf49 100644
--- a/hal/lpc.c
+++ b/hal/lpc.c
@@ -29,8 +29,8 @@
 static int flash_init = 0;
 uint32_t SystemCoreClock;
 
-#ifndef NVM_FLASH_WRITEONCE
-#   error "wolfBoot LPC HAL: no WRITEONCE support detected. Please define NVM_FLASH_WRITEONCE"
+#ifdef NVM_FLASH_WRITEONCE
+#   error "wolfBoot LPC HAL: WRITEONCE support detected. Please do not define NVM_FLASH_WRITEONCE on this platform."
 #endif
 
 #define BOARD_BOOTCLOCKPLL180M_CORE_CLOCK 180000000U