Index: winetests/rpcrt4/server.c
===================================================================
--- winetests/rpcrt4/server.c	(revision 70217)
+++ winetests/rpcrt4/server.c	(working copy)
@@ -1341,7 +1341,7 @@
   ok(sum_var_array(&c[2], 0) == 0, "RPC sum_conf_array\n");
 
   ok(dot_two_vectors(vs) == -4, "RPC dot_two_vectors\n");
-  cs = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET(cs_t, ca[5]));
+  cs = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET(cs_t, ca[4])+ sizeof(int));
   cs->n = 5;
   cs->ca[0] = 3;
   cs->ca[1] = 5;