diff --git a/board.mk b/board.mk
index c414a96..45a3cf0 100644
--- a/board.mk
+++ b/board.mk
@@ -3,6 +3,8 @@ BOARDCPPSRC =  $(BOARD_DIR)/board_configuration.cpp
 DDEFS += -DFIRMWARE_ID=\"XXX\"
 SHORT_BOARD_NAME=XXX
 
+DDEFS += -DRAM_UNUSED_SIZE=1000
+
 # assign critical LED to a non-existent pin if you do not have it on your board
 # good old PD14 is still the default value
-# DDEFS += -DLED_CRITICAL_ERROR_BRAIN_PIN=Gpio::I15
\ No newline at end of file
+# DDEFS += -DLED_CRITICAL_ERROR_BRAIN_PIN=Gpio::I15