diff --git a/apps/microtvm/zephyr/demo_runtime/boards/qemu_x86.conf b/apps/microtvm/zephyr/demo_runtime/boards/qemu_x86.conf
index 7ba7b0d2e983..f314f59a597a 100644
--- a/apps/microtvm/zephyr/demo_runtime/boards/qemu_x86.conf
+++ b/apps/microtvm/zephyr/demo_runtime/boards/qemu_x86.conf
@@ -21,4 +21,5 @@
 CONFIG_TEST_RANDOM_GENERATOR=y
 CONFIG_TIMER_RANDOM_GENERATOR=y
 
+# Default stack size is 1k, this is required for debug mode. 
 CONFIG_MAIN_STACK_SIZE=1536