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-rw-r--r--keyboards/helix/rev2/rules.mk5
1 files changed, 5 insertions, 0 deletions
diff --git a/keyboards/helix/rev2/rules.mk b/keyboards/helix/rev2/rules.mk
index 4db8f7da94..7357d568c6 100644
--- a/keyboards/helix/rev2/rules.mk
+++ b/keyboards/helix/rev2/rules.mk
@@ -5,6 +5,11 @@ SRC += local_drivers/serial.c
SRC += local_drivers/ssd1306.c
KEYBOARD_PATHS += $(HELIX_TOP_DIR)/local_drivers
+# A workaround until #7089 is merged.
+# serial.c must not be compiled with the -lto option.
+# The current LIB_SRC has a side effect with the -fno-lto option, so use it.
+LIB_SRC += local_drivers/serial.c
+
CUSTOM_MATRIX = yes
SRC += rev2/matrix.c