diff --git a/keyboards/a_dux/rules.mk b/keyboards/a_dux/rules.mk
index 95847adba14..f4f3aaf3824 100644
--- a/keyboards/a_dux/rules.mk
+++ b/keyboards/a_dux/rules.mk
@@ -15,6 +15,7 @@ COMMAND_ENABLE = no         # Commands for debug and configuration
 NKRO_ENABLE = yes           # Enable N-Key Rollover
 BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+UNICODE_ENABLE = yes        # Unicode
 AUDIO_ENABLE = no           # Audio output
-UNICODE_ENABLE = yes
-SPLIT_KEYBOARD = yes
+SPLIT_KEYBOARD = yes        # Use shared split_common code
+LAYOUTS = split_3x5_2
diff --git a/keyboards/cradio/cradio.h b/keyboards/cradio/cradio.h
index 527cc16ad0f..f013386bf83 100644
--- a/keyboards/cradio/cradio.h
+++ b/keyboards/cradio/cradio.h
@@ -48,3 +48,5 @@
         { R16, R17, ___, ___, ___ }  \
     }
 
+#define LAYOUT LAYOUT_split_3x5_2
+
diff --git a/keyboards/cradio/rules.mk b/keyboards/cradio/rules.mk
index aa1b1c0b36b..1e4940ca7d1 100644
--- a/keyboards/cradio/rules.mk
+++ b/keyboards/cradio/rules.mk
@@ -18,3 +18,4 @@ RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 UNICODE_ENABLE = yes        # Unicode
 AUDIO_ENABLE = no           # Audio output
 SPLIT_KEYBOARD = yes        # Use shared split_common code
+LAYOUTS = split_3x5_2
diff --git a/keyboards/ferris/0_1/rules.mk b/keyboards/ferris/0_1/rules.mk
index 86db6e4d12a..4b8f1f0c9ab 100644
--- a/keyboards/ferris/0_1/rules.mk
+++ b/keyboards/ferris/0_1/rules.mk
@@ -23,3 +23,5 @@ LTO_ENABLE = yes
 
 SRC += matrix.c
 QUANTUM_LIB_SRC += i2c_master.c
+
+LAYOUTS = split_3x5_2
diff --git a/keyboards/ferris/0_2/rules.mk b/keyboards/ferris/0_2/rules.mk
index 0c12328cee8..2d406f5c1d8 100644
--- a/keyboards/ferris/0_2/rules.mk
+++ b/keyboards/ferris/0_2/rules.mk
@@ -23,3 +23,5 @@ LTO_ENABLE = no
 
 SRC += matrix.c
 QUANTUM_LIB_SRC += i2c_master.c
+
+LAYOUTS = split_3x5_2
diff --git a/keyboards/ferris/sweep/rules.mk b/keyboards/ferris/sweep/rules.mk
index 93998387338..ffc17739f70 100644
--- a/keyboards/ferris/sweep/rules.mk
+++ b/keyboards/ferris/sweep/rules.mk
@@ -18,3 +18,4 @@ RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 UNICODE_ENABLE = yes        # Unicode
 AUDIO_ENABLE = no           # Audio output
 SPLIT_KEYBOARD = yes        # Use shared split_common code
+LAYOUTS = split_3x5_2