@@ -22,11 +22,17 @@
 
 #include <errno.h>
 #include <signal.h>
 
 #ifdef HAVE_UNISTD_H
+# ifdef __GLIBC__
+#  undef __USE_XOPEN	/* Needed to avoid old glibc using __block */
+# endif
 # include <unistd.h>
+# ifdef __GLIBC__
+#  define __USE_XOPEN 1
+# endif
 #endif
 
 #import "OFApplication.h"
 #import "OFString.h"
 #import "OFArray.h"