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-rw-r--r--keyboards/cannonkeys/iron165/rules.mk4
1 files changed, 4 insertions, 0 deletions
diff --git a/keyboards/cannonkeys/iron165/rules.mk b/keyboards/cannonkeys/iron165/rules.mk
index edc84edd51..33529718eb 100644
--- a/keyboards/cannonkeys/iron165/rules.mk
+++ b/keyboards/cannonkeys/iron165/rules.mk
@@ -20,3 +20,7 @@ NKRO_ENABLE = yes # USB Nkey Rollover
CUSTOM_MATRIX = no # Custom matrix file
# BACKLIGHT_ENABLE = yes # This is broken on 072 for some reason
RGBLIGHT_ENABLE = no
+
+
+# Enter lower-power sleep mode when on the ChibiOS idle thread
+OPT_DEFS += -DCORTEX_ENABLE_WFI_IDLE=TRUE