diff --git a/samples/bluetooth/mesh/prj_bbc_microbit.conf b/samples/bluetooth/mesh/prj_bbc_microbit.conf
index c3cb3618ab87..13d5234c9385 100644
--- a/samples/bluetooth/mesh/prj_bbc_microbit.conf
+++ b/samples/bluetooth/mesh/prj_bbc_microbit.conf
@@ -3,7 +3,7 @@ CONFIG_ISR_STACK_SIZE=768
 CONFIG_MAIN_STACK_SIZE=512
 CONFIG_DISPLAY=y
 CONFIG_MICROBIT_DISPLAY=y
-CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=1536
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=1500
 CONFIG_GPIO=y
 
 CONFIG_BT_SETTINGS=y