diff --git a/README.md b/README.md
index 3a44c4d..355103a 100644
--- a/README.md
+++ b/README.md
@@ -39,10 +39,10 @@ For debian use;
 
 ## Usage
 
-Include the `lib/make/msxbuild.mk` file from your Makefile.
+Include the `lib/make/msxbuild.mk` file from your Makefile.  
 And override the paths if needed;
-* PATH_SDCC       ?= /usr/bin
-* PATH_OPENMSX    ?= /usr/bin
+* PATH_SDCC=/usr/bin
+* PATH_OPENMSX=/usr/bin
 
 Then build result based compile rules see an example in; `test/ahello-m80/0module.mk`