Index: src/OFTLSKey.h
==================================================================
--- src/OFTLSKey.h
+++ src/OFTLSKey.h
@@ -16,10 +16,15 @@
 
 #import "OFObject.h"
 #import "OFList.h"
 
 #import "threading.h"
+
+/* Haiku used to define this for some unknown reason which causes trouble */
+#ifdef protected
+# undef protected
+#endif
 
 /**
  * \brief A class for Thread Local Storage keys.
  */
 @interface OFTLSKey: OFObject

Index: src/OFThread.h
==================================================================
--- src/OFThread.h
+++ src/OFThread.h
@@ -16,10 +16,15 @@
 
 #import "OFObject.h"
 #import "OFTLSKey.h"
 
 #import "threading.h"
+
+/* Haiku used to define this for some unknown reason which causes trouble */
+#ifdef protected
+# undef protected
+#endif
 
 @class OFDate;
 @class OFSortedList;
 @class OFRunLoop;