--- mstools/samples/rpc/data/dunion/dunion.idl	2018/08/09 18:20:59	1.1.1.1
+++ mstools/samples/rpc/data/dunion/dunion.idl	2018/08/09 18:22:09	1.1.1.2
@@ -1,21 +1,21 @@
-[ uuid (12345678-1234-1234-1234-123456789ABC),
+[ uuid (87E5BFA0-CA46-1067-B31B-00DD010662DA),
   version(1.0),
   pointer_default(unique)]
 interface dunion
 {
 typedef [switch_type(short)] union {
-    [case(0)]    short     sVal;
-    [case(1)]    float     fVal;
-    [case(2)]    char     chVal;
+    [case(0)]	 short		sVal;
+    [case(1)]	 float		fVal;
+    [case(2)]	 unsigned char	chVal;
     [default];
 } DISCRIM_UNION_PARAM_TYPE;
 
 typedef struct {
     short sDiscrim;	/* discriminant must precede union */
     [switch_is(sDiscrim)] union {
-       [case(0)]   short     sVal;
-       [case(1)]   float     fVal;
-       [case(2)]   char      chVal;
+       [case(0)]   short	  sVal;
+       [case(1)]   float	  fVal;
+       [case(2)]   unsigned char  chVal;
        [default]         ;
     } u;
 } DISCRIM_UNION_STRUCT_TYPE;