diff --git a/Make.rules b/Make.rules
index 903a5a4..59eca2f 100644
--- a/Make.rules
+++ b/Make.rules
@@ -51,11 +51,6 @@ ifeq ($(ARCH),arm)
   FORMAT = -O binary
 endif
 
-ifeq ($(ARCH),aarch64)
-  LDFLAGS += --defsym=EFI_SUBSYSTEM=0x0a
-  FORMAT = -O binary
-endif
-
 %.efi: %.so
 	$(OBJCOPY) -j .text -j .sdata -j .data -j .dynamic -j .dynsym \
 		   -j .rel -j .rela -j .rel.* -j .rela.* -j .rel* -j .rela* \