diff --git a/boot/zephyr/boards/nrf51_pca10028.conf b/boot/zephyr/boards/nrf51_pca10028.conf
new file mode 100644
index 0000000..61b6568
--- /dev/null
+++ b/boot/zephyr/boards/nrf51_pca10028.conf
@@ -0,0 +1,5 @@
+# Due the small boot partition can't use logging and debug optimalization
+# out-off-the-box. For using these features need to increase boot partition via
+# zephyr DTS.
+CONFIG_BOOT_HAVE_LOGGING=n
+CONFIG_SIZE_OPTIMIZATIONS=y