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-rw-r--r--keyboards/clueboard/card/rules.mk2
1 files changed, 2 insertions, 0 deletions
diff --git a/keyboards/clueboard/card/rules.mk b/keyboards/clueboard/card/rules.mk
index 37b439e75a..46d6f91130 100644
--- a/keyboards/clueboard/card/rules.mk
+++ b/keyboards/clueboard/card/rules.mk
@@ -19,3 +19,5 @@ MIDI_ENABLE = no # MIDI controls
UNICODE_ENABLE = no # Unicode
BLUETOOTH_ENABLE = no # Enable Bluetooth with the Adafruit EZ-Key HID
AUDIO_ENABLE = yes # Audio output on port C6
+
+LINK_TIME_OPTIMIZATION_ENABLE = yes