diff --git a/device/prj.conf.overlays/nrf_shared.conf b/device/prj.conf.overlays/nrf_shared.conf
index b575874c8..b5a117ad2 100644
--- a/device/prj.conf.overlays/nrf_shared.conf
+++ b/device/prj.conf.overlays/nrf_shared.conf
@@ -95,3 +95,7 @@ CONFIG_PM_DEVICE=y
 
 # set -O2
 CONFIG_SPEED_OPTIMIZATIONS=y
+
+# macro evaluation can take some depth...
+CONFIG_MAIN_STACK_SIZE=4096
+