diff --git a/src/audio/coreaudio/SDL_coreaudio.m b/src/audio/coreaudio/SDL_coreaudio.m
index f740961ee..1628c2c49 100644
--- a/src/audio/coreaudio/SDL_coreaudio.m
+++ b/src/audio/coreaudio/SDL_coreaudio.m
@@ -291,7 +291,7 @@ static SDL_AudioDevice **open_devices;
 
 static BOOL session_active = NO;
 
-static void pause_audio_devices()
+static void pause_audio_devices(void)
 {
     int i;
 
@@ -307,7 +307,7 @@ static void pause_audio_devices()
     }
 }
 
-static void resume_audio_devices()
+static void resume_audio_devices(void)
 {
     int i;
 
diff --git a/src/video/uikit/SDL_uikitevents.m b/src/video/uikit/SDL_uikitevents.m
index 1c6fe13da..4bec9685a 100644
--- a/src/video/uikit/SDL_uikitevents.m
+++ b/src/video/uikit/SDL_uikitevents.m
@@ -274,7 +274,7 @@ static id mouse_connect_observer = nil;
 static id mouse_disconnect_observer = nil;
 static bool mouse_relative_mode = SDL_FALSE;
 
-static void UpdatePointerLock()
+static void UpdatePointerLock(void)
 {
     SDL_VideoDevice *_this = SDL_GetVideoDevice();
     SDL_Window *window;
diff --git a/src/video/uikit/SDL_uikitmodes.m b/src/video/uikit/SDL_uikitmodes.m
index 6d5ecd9ff..220589d10 100644
--- a/src/video/uikit/SDL_uikitmodes.m
+++ b/src/video/uikit/SDL_uikitmodes.m
@@ -397,7 +397,7 @@ void UIKit_QuitModes(SDL_VideoDevice *_this)
 }
 
 #if !TARGET_OS_TV
-void SDL_OnApplicationDidChangeStatusBarOrientation()
+void SDL_OnApplicationDidChangeStatusBarOrientation(void)
 {
     BOOL isLandscape = UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation);
     SDL_VideoDisplay *display = SDL_GetVideoDisplay(SDL_GetPrimaryDisplay());
diff --git a/src/video/uikit/SDL_uikitvideo.m b/src/video/uikit/SDL_uikitvideo.m
index 13e12e5da..2eccb1bec 100644
--- a/src/video/uikit/SDL_uikitvideo.m
+++ b/src/video/uikit/SDL_uikitvideo.m
@@ -234,7 +234,7 @@ CGRect UIKit_ComputeViewFrame(SDL_Window *window, UIScreen *screen)
     return frame;
 }
 
-void UIKit_ForceUpdateHomeIndicator()
+void UIKit_ForceUpdateHomeIndicator(void)
 {
 #if !TARGET_OS_TV
     /* Force the main SDL window to re-evaluate home indicator state */