diff --git a/macosx/HID_Utilities_External.h b/macosx/HID_Utilities_External.h
index d890bfcc..fe4b0f03 100644
--- a/macosx/HID_Utilities_External.h
+++ b/macosx/HID_Utilities_External.h
@@ -51,7 +51,7 @@
 /*****************************************************/
 #if !TARGET_RT_MAC_CFM
 #include <IOKit/hid/IOHIDLib.h>
-#endif TARGET_RT_MAC_CFM
+#endif // TARGET_RT_MAC_CFM
 
 //#include <IOKit/hid/IOHIDUsageTables.h>
 #if 0   // NOTE: These are now in <IOKit/hid/IOHIDUsageTables.h>
@@ -109,7 +109,7 @@ typedef enum IOHIDReportType {
 // Notes: This is a MachO function pointer. If you're using CFM you have to call MachOFunctionPointerForCFMFunctionPointer.
 typedef void( *IOHIDCallbackFunction ) ( void* target, unsigned long result, void* refcon, void* sender );
 typedef void* IOHIDEventStruct;
-#endif TARGET_RT_MAC_CFM
+#endif // TARGET_RT_MAC_CFM
 
 // Device and Element Interfaces