diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fa2f3f9..10e9636 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,4 +18,4 @@ jobs:
           apt update
           apt install make gcc sdcc xxd python-is-python3 libjson-c-dev -y
       - name: Make project
-        run: make
\ No newline at end of file
+        run: make MACHINE="KP_9000_6XHML_X2"
\ No newline at end of file
diff --git a/Makefile b/Makefile
index a6a2bf5..51a0b29 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,11 @@ SUBDIRSCLEAN=$(addsuffix clean,$(SUBDIRS))
 BUILDDIR = output/
 VERSION_HEADER := version.h
 
+ifeq ($(MACHINE),)
+else
+	CC_FLAGS += -DMACHINE_$(MACHINE)
+endif
+
 all: create_build_dir $(VERSION_HEADER) $(SUBDIRS) $(BUILDDIR)rtlplayground.bin
 
 create_build_dir:
diff --git a/machine.c b/machine.c
index 73a0c7b..d48c2d6 100644
--- a/machine.c
+++ b/machine.c
@@ -97,6 +97,9 @@ __code const struct machine machine = {
 			LEDS_2G5 | LEDS_LINK | LEDS_ACT },
 		    },
 };
+
+void machine_custom_init(void) { }
+
 #elif defined MACHINE_KP_9000_9XHML_X
 __code const struct machine machine = {
 	.machine_name = "keepLink KP-9000-9XHML-X",
diff --git a/machine.h b/machine.h
index 06a2475..bf5aa0a 100644
--- a/machine.h
+++ b/machine.h
@@ -9,6 +9,7 @@
 // #define MACHINE_KP_9000_6XHML_X2
 // #define MACHINE_KP_9000_6XH_X
 // #define MACHINE_KP_9000_9XH_X_EU
+// #define MACHINE_KP_9000_9XHML_X
 // #define MACHINE_SWGT024_V2_0
 // #define MACHINE_HORACO_ZX_SG4T2
 // #define MACHINE_TRENDNET_TEG_S562