diff --git a/keyboards/lfkeyboards/mini1800/rules.mk b/keyboards/lfkeyboards/mini1800/rules.mk
index be670b9b4..a1e52aae9 100644
--- a/keyboards/lfkeyboards/mini1800/rules.mk
+++ b/keyboards/lfkeyboards/mini1800/rules.mk
@@ -52,6 +52,8 @@ F_USB = $(F_CPU)
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
+# Extra source files for IS3731 lighting
+SRC = TWIlib.c issi.c lighting.c
 
 ifeq ($(strip $(ISSI_ENABLE)), yes)
     # TMK_COMMON_DEFS += -DISSI_ENABLE
diff --git a/keyboards/lfkeyboards/rules.mk b/keyboards/lfkeyboards/rules.mk
deleted file mode 100644
index 5cf759a2f..000000000
--- a/keyboards/lfkeyboards/rules.mk
+++ /dev/null
@@ -1 +0,0 @@
-SRC = TWIlib.c issi.c lighting.c