diff --git a/boards/x86_64/intel64/qemu-intel64/configs/ostest/defconfig b/boards/x86_64/intel64/qemu-intel64/configs/ostest/defconfig
index dcd95a1fe82..8e89eacf86e 100644
--- a/boards/x86_64/intel64/qemu-intel64/configs/ostest/defconfig
+++ b/boards/x86_64/intel64/qemu-intel64/configs/ostest/defconfig
@@ -24,6 +24,7 @@ CONFIG_ARCH_X86_64=y
 CONFIG_BOARD_LOOPSPERMSEC=999
 CONFIG_BOOT_RUNFROMEXTSRAM=y
 CONFIG_CONSOLE_SYSLOG=y
+CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_IDLETHREAD_STACKSIZE=4194304
 CONFIG_INIT_ENTRYPOINT="ostest_main"