diff --git a/boards/nuvoton/numaker_pfm_m487/numaker_pfm_m487_defconfig b/boards/nuvoton/numaker_pfm_m487/numaker_pfm_m487_defconfig
index 0873db33cf343..f25fe9dc33e79 100644
--- a/boards/nuvoton/numaker_pfm_m487/numaker_pfm_m487_defconfig
+++ b/boards/nuvoton/numaker_pfm_m487/numaker_pfm_m487_defconfig
@@ -13,3 +13,6 @@ CONFIG_SERIAL=y
 # Console
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
+
+# Enable hex output for openocd
+CONFIG_BUILD_OUTPUT_HEX=y