dinput: Add Mac OS/X joystick support.
diff --git a/configure.ac b/configure.ac
index b1c3c12..0930f5c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -263,6 +263,7 @@
 	CoreAudio/CoreAudio.h \
 	DiskArbitration/DiskArbitration.h \
 	IOKit/IOKitLib.h \
+	IOKit/hid/IOHIDLib.h \
 	alias.h \
 	alsa/asoundlib.h \
 	arpa/inet.h \