diff --git a/modules/plugin/tools/sdk/samples/include/npplat.h b/modules/plugin/tools/sdk/samples/include/npplat.h
index f2aa9733414..d78ba51e80c 100644
--- a/modules/plugin/tools/sdk/samples/include/npplat.h
+++ b/modules/plugin/tools/sdk/samples/include/npplat.h
@@ -57,10 +57,6 @@
 /**************************************************/
 #ifdef XP_UNIX
 #include <stdio.h>
-
-#define HIBYTE(i) (i >> 8)
-#define LOBYTE(i) (i & 0xff)
-
 #endif //XP_UNIX
 
 /**************************************************/
@@ -79,9 +75,6 @@
 
 #include "jri.h"
 
-#define HIBYTE(i) (i >> 8)
-#define LOBYTE(i) (i & 0xff)
-
 // The Mixed Mode procInfos defined in npupp.h assume Think C-
 // style calling conventions.  These conventions are used by
 // Metrowerks with the exception of pointer return types, which
@@ -146,4 +139,12 @@ NPError Private_SetValue(NPP instance, NPNVariable variable, void *value);
 
 #endif //XP_MAC
 
+#ifndef HIBYTE
+#define HIBYTE(i) (i >> 8)
+#endif
+
+#ifndef LOBYTE
+#define LOBYTE(i) (i & 0xff)
+#endif
+
 #endif //_NPPLAT_H_