Index: kernel/genarch/include/fb/fb.h
===================================================================
--- kernel/genarch/include/fb/fb.h	(revision b3f8fb771f871e7f2bb35ce9339717639e8f86d6)
+++ kernel/genarch/include/fb/fb.h	(revision b1349e0e6dd0ceaac24eaa1e363afe9e5d81fffc)
@@ -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);