diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 03dba344bf..5829983165 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -251,16 +251,16 @@ endif # CONFIG_ARCH_ROMSTAGE_X86_32 / CONFIG_ARCH_ROMSTAGE_X86_64
 
 ifeq ($(CONFIG_ARCH_RAMSTAGE_X86_32)$(CONFIG_ARCH_RAMSTAGE_X86_64),y)
 
-ifeq ($(CONFIG_COMPILE_IN_DSDT),y)
-ramstage-srcs += $(obj)/dsdt.aml
-
 ifeq ($(CONFIG_ARCH_RAMSTAGE_X86_32),y)
 target-objcopy=-O elf32-i386 -B i386
 endif
 ifeq ($(CONFIG_ARCH_RAMSTAGE_X86_64),y)
-target-objcopy=-O elf64-x86_64 -B x86_64
+target-objcopy=-O elf64-x86-64 -B i386:x86-64
 endif
 
+ifeq ($(CONFIG_COMPILE_IN_DSDT),y)
+ramstage-srcs += $(obj)/dsdt.aml
+
 define ramstage-objs_aml_template
 $(call src-to-obj,ramstage,$(1).aml): $(1).aml
 	@printf "    OBJCOPY    $$(subst $$(obj)/,,$$(@))\n"
diff --git a/src/cpu/x86/Makefile.inc b/src/cpu/x86/Makefile.inc
index e9394b2d02..863fabc589 100644
--- a/src/cpu/x86/Makefile.inc
+++ b/src/cpu/x86/Makefile.inc
@@ -30,8 +30,4 @@ $(SIPI_BIN): $(SIPI_RMOD)
 
 $(SIPI_BIN).ramstage.manual: $(SIPI_BIN)
 	@printf "    OBJCOPY    $(subst $(obj)/,,$(@))\n"
-ifeq ($(CONFIG_ARCH_RAMSTAGE_X86_32),y)
-	cd $(dir $@); $(OBJCOPY_rmodules_$(ARCH-ramstage-y)) -I binary $(notdir $<) -O elf32-i386 -B i386 $(notdir $@)
-else
-	cd $(dir $@); $(OBJCOPY_rmodules_$(ARCH-ramstage-y)) -I binary $(notdir $<) -O elf64-x86_64 -B x86_64 $(notdir $@)
-endif
+	cd $(dir $@); $(OBJCOPY_rmodules_$(ARCH-ramstage-y)) -I binary $(notdir $<) $(target-objcopy) $(notdir $@)
diff --git a/src/cpu/x86/smm/Makefile.inc b/src/cpu/x86/smm/Makefile.inc
index b062258103..c4b08fe5cb 100644
--- a/src/cpu/x86/smm/Makefile.inc
+++ b/src/cpu/x86/smm/Makefile.inc
@@ -34,11 +34,7 @@ $(obj)/cpu/x86/smm/smm.o: $$(smm-objs) $(COMPILER_RT_smm)
 # ELF symbol names.
 $(obj)/cpu/x86/smm/smm.ramstage.manual: $(obj)/cpu/x86/smm/smm
 	@printf "    OBJCOPY    $(subst $(obj)/,,$(@))\n"
-ifeq ($(CONFIG_ARCH_RAMSTAGE_X86_32),y)
-	cd $(dir $@); $(OBJCOPY_smm) -I binary $(notdir $<) -O elf32-i386 -B i386 $(notdir $@)
-else
-	cd $(dir $@); $(OBJCOPY_smm) -I binary $(notdir $<) -O elf64-x86_64 -B x86_64 $(notdir $@)
-endif
+	cd $(dir $@); $(OBJCOPY_smm) -I binary $(notdir $<) $(target-objcopy) $(notdir $@)
 
 ifeq ($(CONFIG_SMM_TSEG),y)
 
@@ -68,11 +64,7 @@ $(obj)/cpu/x86/smm/smmstub: $(obj)/cpu/x86/smm/smmstub.elf.rmod
 
 $(obj)/cpu/x86/smm/smmstub.ramstage.manual: $(obj)/cpu/x86/smm/smmstub
 	@printf "    OBJCOPY    $(subst $(obj)/,,$(@))\n"
-ifeq ($(CONFIG_ARCH_RAMSTAGE_X86_32),y)
-	cd $(dir $@); $(OBJCOPY_smmstub) -I binary $(notdir $<) -O elf32-i386 -B i386 $(notdir $@)
-else
-	cd $(dir $@); $(OBJCOPY_smmstub) -I binary $(notdir $<) -O elf64-x86_64 -B x86_64 $(notdir $@)
-endif
+	cd $(dir $@); $(OBJCOPY_smmstub) -I binary $(notdir $<) $(target-objcopy) $(notdir $@)
 
 # C-based SMM handler.