Index: kernel/arch/amd64/Makefile.inc
===================================================================
--- kernel/arch/amd64/Makefile.inc	(revision a0a273e83bf1cedff09f94c8181d7f89a6c637a6)
+++ kernel/arch/amd64/Makefile.inc	(revision e9dba436d9889d3165e64f44a57e7177939eacd8)
@@ -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