kc3-lang/SDL

diff --git a/src/joystick/darwin/SDL_iokitjoystick.c b/src/joystick/darwin/SDL_iokitjoystick.c
index 4484c40..9d4514b 100644
--- a/src/joystick/darwin/SDL_iokitjoystick.c
+++ b/src/joystick/darwin/SDL_iokitjoystick.c
@@ -526,11 +526,15 @@ GetDeviceInfo(IOHIDDeviceRef hidDevice, recDevice *pDevice)
 static SDL_bool
 JoystickAlreadyKnown(IOHIDDeviceRef ioHIDDeviceObject)
 {
+    recDevice *i;
+
+#if TARGET_OS_OSX
     extern SDL_bool IOS_SupportedHIDDevice(IOHIDDeviceRef device);
     if (IOS_SupportedHIDDevice(ioHIDDeviceObject)) {
         return SDL_TRUE;
     }
-    recDevice *i;
+#endif
+
     for (i = gpDeviceList; i != NULL; i = i->pNext) {
         if (i->deviceRef == ioHIDDeviceObject) {
             return SDL_TRUE;
diff --git a/src/joystick/iphoneos/SDL_mfijoystick.m b/src/joystick/iphoneos/SDL_mfijoystick.m
index 6d92b4c..df5edc3 100644
--- a/src/joystick/iphoneos/SDL_mfijoystick.m
+++ b/src/joystick/iphoneos/SDL_mfijoystick.m
@@ -1365,7 +1365,6 @@ IOS_JoystickGetGamepadMapping(int device_index, SDL_GamepadMapping *out)
 }
 
 #if TARGET_OS_OSX
-extern SDL_bool IOS_SupportedHIDDevice(IOHIDDeviceRef device);
 SDL_bool IOS_SupportedHIDDevice(IOHIDDeviceRef device)
 {
 #ifdef SDL_JOYSTICK_MFI