Index: kernel/arch/amd64/Makefile.inc
===================================================================
--- kernel/arch/amd64/Makefile.inc	(revision 287920fbf506e950a6b1035b8520eeaf673338bf)
+++ kernel/arch/amd64/Makefile.inc	(revision f9a56c06291b17dff86c61d294ec807828f33f96)
@@ -62,4 +62,5 @@
 
 CONFIG_I8042 = y
+DEFS += -DCONFIG_I8042
 
 ## Accepted configuration directives