12 files changed, 22 insertions, 22 deletions
diff --git a/quantum/action.c b/quantum/action.c
index 79ea2b7635..6b5660af8b 100644
--- a/quantum/action.c
+++ b/quantum/action.c
@@ -1050,7 +1050,7 @@ void clear_keyboard_but_mods(void) {
  *
  * FIXME: Needs documentation.
  */
-void clear_keyboard_but_mods_and_keys() {
+void clear_keyboard_but_mods_and_keys(void) {
 #ifdef EXTRAKEY_ENABLE
     host_system_send(0);
     host_consumer_send(0);
diff --git a/quantum/action_util.c b/quantum/action_util.c
index 738410a4ac..7f7d32887b 100644
--- a/quantum/action_util.c
+++ b/quantum/action_util.c
@@ -98,12 +98,12 @@ enum {
 
 #    if (defined(ONESHOT_TIMEOUT) && (ONESHOT_TIMEOUT > 0))
 static uint16_t oneshot_layer_time = 0;
-inline bool     has_oneshot_layer_timed_out() {
+inline bool     has_oneshot_layer_timed_out(void) {
     return TIMER_DIFF_16(timer_read(), oneshot_layer_time) >= ONESHOT_TIMEOUT && !(get_oneshot_layer_state() & ONESHOT_TOGGLED);
 }
 #        ifdef SWAP_HANDS_ENABLE
 static uint16_t oneshot_swaphands_time = 0;
-inline bool     has_oneshot_swaphands_timed_out() {
+inline bool     has_oneshot_swaphands_timed_out(void) {
     return TIMER_DIFF_16(timer_read(), oneshot_swaphands_time) >= ONESHOT_TIMEOUT && (swap_hands_oneshot == SHO_ACTIVE);
 }
 #        endif
diff --git a/quantum/audio/audio.c b/quantum/audio/audio.c
index c6523b908c..ca78a483ad 100644
--- a/quantum/audio/audio.c
+++ b/quantum/audio/audio.c
@@ -112,7 +112,7 @@ static bool    audio_initialized    = false;
 static bool    audio_driver_stopped = true;
 audio_config_t audio_config;
 
-void audio_init() {
+void audio_init(void) {
     if (audio_initialized) {
         return;
     }
@@ -185,7 +185,7 @@ bool audio_is_on(void) {
     return (audio_config.enable != 0);
 }
 
-void audio_stop_all() {
+void audio_stop_all(void) {
     if (audio_driver_stopped) {
         return;
     }
diff --git a/quantum/audio/voices.c b/quantum/audio/voices.c
index 1c08a3af36..01f257f4d4 100644
--- a/quantum/audio/voices.c
+++ b/quantum/audio/voices.c
@@ -36,11 +36,11 @@ void set_voice(voice_type v) {
     voice = v;
 }
 
-void voice_iterate() {
+void voice_iterate(void) {
     voice = (voice + 1) % number_of_voices;
 }
 
-void voice_deiterate() {
+void voice_deiterate(void) {
     voice = (voice - 1 + number_of_voices) % number_of_voices;
 }
 
diff --git a/quantum/joystick.c b/quantum/joystick.c
index 057a018dff..02818e4acd 100644
--- a/quantum/joystick.c
+++ b/quantum/joystick.c
@@ -111,7 +111,7 @@ int16_t joystick_read_axis(uint8_t axis) {
     return ranged_val;
 }
 
-void joystick_read_axes() {
+void joystick_read_axes(void) {
 #if JOYSTICK_AXIS_COUNT > 0
     for (int i = 0; i < JOYSTICK_AXIS_COUNT; ++i) {
         if (joystick_axes[i].input_pin == JS_VIRTUAL_AXIS) {
diff --git a/quantum/keyboard.c b/quantum/keyboard.c
index 37675ded0b..1de5f1cd0c 100644
--- a/quantum/keyboard.c
+++ b/quantum/keyboard.c
@@ -238,7 +238,7 @@ __attribute__((weak)) void keyboard_pre_init_kb(void) {
  * FIXME: needs doc
  */
 
-__attribute__((weak)) void keyboard_post_init_user() {}
+__attribute__((weak)) void keyboard_post_init_user(void) {}
 
 /** \brief keyboard_post_init_kb
  *
diff --git a/quantum/process_keycode/process_audio.c b/quantum/process_keycode/process_audio.c
index 03b0af9277..c189dd02b7 100644
--- a/quantum/process_keycode/process_audio.c
+++ b/quantum/process_keycode/process_audio.c
@@ -62,5 +62,5 @@ void process_audio_all_notes_off(void) {
     stop_all_notes();
 }
 
-__attribute__((weak)) void audio_on_user() {}
-__attribute__((weak)) void audio_off_user() {}
+__attribute__((weak)) void audio_on_user(void) {}
+__attribute__((weak)) void audio_off_user(void) {}
diff --git a/quantum/process_keycode/process_auto_shift.c b/quantum/process_keycode/process_auto_shift.c
index aaf0cf9142..aad1a164ae 100644
--- a/quantum/process_keycode/process_auto_shift.c
+++ b/quantum/process_keycode/process_auto_shift.c
@@ -344,7 +344,7 @@ bool get_autoshift_state(void) {
     return autoshift_flags.enabled;
 }
 
-uint16_t get_generic_autoshift_timeout() {
+uint16_t get_generic_autoshift_timeout(void) {
     return autoshift_timeout;
 }
 __attribute__((weak)) uint16_t get_autoshift_timeout(uint16_t keycode, keyrecord_t *record) {
@@ -484,7 +484,7 @@ void retroshift_poll_time(keyevent_t *event) {
     retroshift_time      = timer_read();
 }
 // Used to swap the times of Retro Shifted key and Auto Shift key that interrupted it.
-void retroshift_swap_times() {
+void retroshift_swap_times(void) {
     if (last_retroshift_time != 0 && autoshift_flags.in_progress) {
         uint16_t temp        = retroshift_time;
         retroshift_time      = last_retroshift_time;
diff --git a/quantum/process_keycode/process_music.c b/quantum/process_keycode/process_music.c
index ee697a0cc6..7c572079a7 100644
--- a/quantum/process_keycode/process_music.c
+++ b/quantum/process_keycode/process_music.c
@@ -317,10 +317,10 @@ void music_task(void) {
     }
 }
 
-__attribute__((weak)) void music_on_user() {}
+__attribute__((weak)) void music_on_user(void) {}
 
-__attribute__((weak)) void midi_on_user() {}
+__attribute__((weak)) void midi_on_user(void) {}
 
-__attribute__((weak)) void music_scale_user() {}
+__attribute__((weak)) void music_scale_user(void) {}
 
 #endif // defined(AUDIO_ENABLE) || (defined(MIDI_ENABLE) && defined(MIDI_BASIC))
diff --git a/quantum/process_keycode/process_steno.c b/quantum/process_keycode/process_steno.c
index 30a0d4056f..8ba98bd4bb 100644
--- a/quantum/process_keycode/process_steno.c
+++ b/quantum/process_keycode/process_steno.c
@@ -127,7 +127,7 @@ static const uint16_t combinedmap_second[] PROGMEM = {STN_S2, STN_KL, STN_WL, ST
 #endif
 
 #ifdef STENO_ENABLE_ALL
-void steno_init() {
+void steno_init(void) {
     if (!eeconfig_is_enabled()) {
         eeconfig_init();
     }
diff --git a/quantum/process_keycode/process_tap_dance.c b/quantum/process_keycode/process_tap_dance.c
index fbe4ce1d33..706f5cddbb 100644
--- a/quantum/process_keycode/process_tap_dance.c
+++ b/quantum/process_keycode/process_tap_dance.c
@@ -162,7 +162,7 @@ bool process_tap_dance(uint16_t keycode, keyrecord_t *record) {
     return true;
 }
 
-void tap_dance_task() {
+void tap_dance_task(void) {
     tap_dance_action_t *action;
 
     if (!active_td || timer_elapsed(last_tap_time) <= GET_TAPPING_TERM(active_td, &(keyrecord_t){})) return;
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 0fe54c60a7..0e69246f41 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -454,10 +454,10 @@ void update_tri_layer(uint8_t layer1, uint8_t layer2, uint8_t layer3) {
 }
 
 // TODO: remove legacy api
-void matrix_init_quantum() {
+void matrix_init_quantum(void) {
     matrix_init_kb();
 }
-void matrix_scan_quantum() {
+void matrix_scan_quantum(void) {
     matrix_scan_kb();
 }
 
@@ -465,9 +465,9 @@ void matrix_scan_quantum() {
 // Override these functions in your keymap file to play different tunes on
 // different events such as startup and bootloader jump
 
-__attribute__((weak)) void startup_user() {}
+__attribute__((weak)) void startup_user(void) {}
 
-__attribute__((weak)) void shutdown_user() {}
+__attribute__((weak)) void shutdown_user(void) {}
 
 void suspend_power_down_quantum(void) {
     suspend_power_down_kb();