diff --git a/Makefile.projbuild b/Makefile.projbuild
index e21d4c77..324f2829 100644
--- a/Makefile.projbuild
+++ b/Makefile.projbuild
@@ -9,7 +9,7 @@ endif
 BOOT_APP_BIN_FLASH_CMD = $(ESPTOOLPY_SERIAL) write_flash $(BOOT_APP_BIN_OFFSET) $(BOOT_APP_BIN_PATH)
 ESPTOOL_ALL_FLASH_ARGS += $(BOOT_APP_BIN_OFFSET) $(BOOT_APP_BIN_PATH)
 
-CPPFLAGS += -DARDUINO=10800 -DESP32=1 -DARDUINO_ARCH_ESP32=1
+CPPFLAGS += -DARDUINO=10800 -DESP32=1 -DARDUINO_ARCH_ESP32=1 -DBOARD_HAS_PSRAM
 
 boot-app0:
 	@echo "Rebooting to APP0"