Index: kernel/genarch/include/fb/fb.h
===================================================================
--- kernel/genarch/include/fb/fb.h	(revision e71a61d2f187f60c13024e0c300fa8b4703b2c70)
+++ kernel/genarch/include/fb/fb.h	(revision 623b49f1b94781911cb219ad1a68b6afdb2b0bbf)
@@ -39,5 +39,5 @@
 #include <synch/spinlock.h>
 
-extern spinlock_t fb_lock;
+SPINLOCK_EXTERN(fb_lock);
 void fb_init(uintptr_t addr, unsigned int x, unsigned int y, unsigned int scan, unsigned int visual);