Index: kernel/arch/amd64/Makefile.inc
===================================================================
--- kernel/arch/amd64/Makefile.inc	(revision 5b0cf635022b821f28f7a014ad5b39d005cd7666)
+++ kernel/arch/amd64/Makefile.inc	(revision 1ab3c4b698c08d84c77675ba474ca8dfd5164dbc)
@@ -32,5 +32,5 @@
 
 FPU_NO_CFLAGS = -mno-sse -mno-sse2
-COMMON_CFLAGS += -m64 -mcmodel=$(MEMORY_MODEL) -mno-red-zone -fno-unwind-tables -fno-omit-frame-pointer
+COMMON_CFLAGS += -mcmodel=$(MEMORY_MODEL) -mno-red-zone -fno-unwind-tables -fno-omit-frame-pointer
 
 BITS = 64