diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index da8f4129780bd8d25801eeee7742986ec92dddbc..8978e98bed5b60dfa8fb34eca332c68d5f941fb0 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -143,7 +143,7 @@ mcore-$(CONFIG_X86_ES7000)	:= arch/x86/mach-default/
 
 # RDC R-321x subarch support
 mflags-$(CONFIG_X86_RDC321X)	:= -Iinclude/asm-x86/mach-rdc321x
-mcore-$(CONFIG_X86_RDC321X)	:= arch/x86/mach-default
+mcore-$(CONFIG_X86_RDC321X)	:= arch/x86/mach-default/
 core-$(CONFIG_X86_RDC321X)	+= arch/x86/mach-rdc321x/
 
 # default subarch .h files