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-rw-r--r--ports/stm/boards/espruino_pico/mpconfigboard.mk2
1 files changed, 2 insertions, 0 deletions
diff --git a/ports/stm/boards/espruino_pico/mpconfigboard.mk b/ports/stm/boards/espruino_pico/mpconfigboard.mk
index b1b023dd5..556ff35c4 100644
--- a/ports/stm/boards/espruino_pico/mpconfigboard.mk
+++ b/ports/stm/boards/espruino_pico/mpconfigboard.mk
@@ -9,6 +9,8 @@ MCU_SERIES = F4
MCU_VARIANT = STM32F401xE
MCU_PACKAGE = UFQFPN48
+OPTIMIZATION_FLAGS = -Os
+
LD_COMMON = boards/common_default.ld
# use for internal flash
LD_FILE = boards/STM32F401xd_fs.ld