diff --git a/xen/Rules.mk b/xen/Rules.mk
index 70b7489ea8..d6b7cec0a8 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -228,8 +228,9 @@ quiet_cmd_cc_o_c = CC      $@
 ifeq ($(CONFIG_ENFORCE_UNIQUE_SYMBOLS),y)
     cmd_cc_o_c = $(CC) $(c_flags) -c $< -o $(dot-target).tmp -MQ $@
     ifneq ($(CONFIG_CC_IS_CLANG)$(call clang-ifversion,-lt,600,y),yy)
+        rel-path = $(patsubst $(abs_srctree)/%,%,$(call realpath,$(1)))
         cmd_objcopy_fix_sym = \
-	    $(OBJCOPY) --redefine-sym $(<F)=$< $(dot-target).tmp $@ && rm -f $(dot-target).tmp
+           $(OBJCOPY) --redefine-sym $(<F)=$(call rel-path,$<) $(dot-target).tmp $@ && rm -f $(dot-target).tmp
     else
         cmd_objcopy_fix_sym = mv -f $(dot-target).tmp $@
     endif