/usr/include/sys/param.h:190:1: warning: this is the location of the previous definition

Index: backend/xerox_mfp.h
--- backend/xerox_mfp.h.orig
+++ backend/xerox_mfp.h
@@ -21,7 +21,9 @@
 #define UNUSED(x) x
 #endif
 
+#ifndef MIN
 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#endif
 
 #define UNCONST(ptr) ((void *)(long)(ptr))