X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=common_features.mk;h=73aab5d8459832126ab57f43cab4e60c77b9a89d;hb=30c3f3b2bd9c68ba8bba644fcfa97152a4834c03;hp=bd88e04d624dd8001801ccfb8988911e3e67c21c;hpb=4099536c0e7a099b181a80e483b4b95f389b5a7e;p=qmk_firmware.git

diff --git a/common_features.mk b/common_features.mk
index bd88e04d6..73aab5d84 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -263,9 +263,14 @@ ifneq ($(strip $(CUSTOM_MATRIX)), yes)
 endif
 
 ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
+    SERIAL_BACKWARD_COMPAT := $(wildcard $(QUANTUM_DIR)/split_common/serial_backward_compatibility.h)
+    ifneq ($(SERIAL_BACKWARD_COMPAT),)
+      CONFIG_H += $(SERIAL_BACKWARD_COMPAT)
+      # $(info CONFIG_H=$(CONFIG_H))
+    endif
     OPT_DEFS += -DSPLIT_KEYBOARD
     QUANTUM_SRC += $(QUANTUM_DIR)/split_common/split_flags.c \
-                $(QUANTUM_DIR)/split_common/split_util.c \
-                $(QUANTUM_DIR)/split_common/i2c.c \
-                $(QUANTUM_DIR)/split_common/serial.c
+                $(QUANTUM_DIR)/split_common/split_util.c
+    QUANTUM_LIB_SRC += $(QUANTUM_DIR)/split_common/i2c.c
+    QUANTUM_LIB_SRC += $(QUANTUM_DIR)/split_common/serial.c
 endif