diff --git a/boards/risc-v/esp32c6/esp32c6-devkit/configs/coremark/defconfig b/boards/risc-v/esp32c6/esp32c6-devkit/configs/coremark/defconfig
index 4df52f2cef..5fcd33b030 100644
--- a/boards/risc-v/esp32c6/esp32c6-devkit/configs/coremark/defconfig
+++ b/boards/risc-v/esp32c6/esp32c6-devkit/configs/coremark/defconfig
@@ -17,6 +17,8 @@ CONFIG_ARCH_INTERRUPTSTACK=1536
 CONFIG_ARCH_RISCV=y
 CONFIG_BENCHMARK_COREMARK=y
 CONFIG_BOARD_LOOPSPERMSEC=15000
+CONFIG_DEBUG_CUSTOMOPT=y
+CONFIG_DEBUG_OPTLEVEL="-O3"
 CONFIG_FS_PROCFS=y
 CONFIG_IDLETHREAD_STACKSIZE=3072
 CONFIG_INIT_ENTRYPOINT="coremark_main"