diff --git a/keyboards/crkbd/keymaps/christoph-cullmann/keymap.c b/keyboards/crkbd/keymaps/christoph-cullmann/keymap.c
index abce70b..9f0a147 100644
--- a/keyboards/crkbd/keymaps/christoph-cullmann/keymap.c
+++ b/keyboards/crkbd/keymaps/christoph-cullmann/keymap.c
@@ -5,7 +5,7 @@
 
 #include QMK_KEYBOARD_H
 
-char chordal_hold_handedness_user(keypos_t key)
+char chordal_hold_handedness(keypos_t key
 {
     return (key.row < MATRIX_ROWS / 2) ? 'L' : 'R';
 }
diff --git a/keyboards/ferris/keymaps/christoph-cullmann/keymap.c b/keyboards/ferris/keymaps/christoph-cullmann/keymap.c
index 4329c79..1db3c1a 100644
--- a/keyboards/ferris/keymaps/christoph-cullmann/keymap.c
+++ b/keyboards/ferris/keymaps/christoph-cullmann/keymap.c
@@ -5,7 +5,7 @@
 
 #include QMK_KEYBOARD_H
 
-char chordal_hold_handedness_user(keypos_t key)
+char chordal_hold_handedness(keypos_t key
 {
     return (key.row < MATRIX_ROWS / 2) ? 'L' : 'R';
 }
diff --git a/keyboards/planck/keymaps/christoph-cullmann/keymap.c b/keyboards/planck/keymaps/christoph-cullmann/keymap.c
index b276ac8..10129e6 100644
--- a/keyboards/planck/keymaps/christoph-cullmann/keymap.c
+++ b/keyboards/planck/keymaps/christoph-cullmann/keymap.c
@@ -5,7 +5,7 @@
 
 #include QMK_KEYBOARD_H
 
-char chordal_hold_handedness_user(keypos_t key)
+char chordal_hold_handedness(keypos_t key
 {
     return ((key.row < 3) || (key.row == 3 && key.col < 3) || (key.row == 7 && key.col > 2)) ? 'L' : 'R';
 }