diff --git a/arch/x86_64/lib/Makefile b/arch/x86_64/lib/Makefile
index 6b510f97cab507b9d8818aad6a1a25825fa0cc0f..6bdf7d824f4c61d72aed29f6d138ad87f5482cee 100644
--- a/arch/x86_64/lib/Makefile
+++ b/arch/x86_64/lib/Makefile
@@ -4,7 +4,7 @@
 
 CFLAGS_csum-partial_64.o := -funroll-loops
 
-obj-y := io.o iomap_copy_64.o
+obj-y := io_64.o iomap_copy_64.o
 obj-$(CONFIG_SMP)	+= msr-on-cpu.o
 
 lib-y := csum-partial_64.o csum-copy_64.o csum-wrappers_64.o delay_64.o \
diff --git a/arch/x86_64/lib/io.c b/arch/x86_64/lib/io_64.c
similarity index 100%
rename from arch/x86_64/lib/io.c
rename to arch/x86_64/lib/io_64.c