diff --git a/mps/src/span.c b/mps/src/span.c
index bb91224bbc1..24f203d26c4 100644
--- a/mps/src/span.c
+++ b/mps/src/span.c
@@ -1,24 +1,24 @@
 /* impl.c.span: ANSI STACK PROBE
  *
- * $HopeName: MMsrc!span.c(trunk.1) $
+ * $HopeName: MMsrc!span.c(trunk.2) $
  * Copyright (C) 1997 Harlequin Limited.  All rights reserved.
  *
  * PURPOSE
  *
  * .purpose: The purpose of the ANSI Stack Probe is to provide a
- * non-functional implementation of the Stack Probe interface.
- * Stack Probe has a function implementation on platforms where the
+ * non-functional implementation of the StackProbe interface.
+ * StackProbe has a function implementation on platforms where the
  * MPS takes some special action to avoid stack overflow.
  */
 
 #include "mpm.h"
 
-SRCID(span, "$HopeName: MMsrc!span.c(trunk.1) $");
+SRCID(span, "$HopeName: MMsrc!span.c(trunk.2) $");
 
 
 /* StackProbe -- probe above the stack to provoke early stack overflow */
 
-void StackProbe(Word depth)
+void StackProbe(Size depth)
 {
   AVER(depth == 0);
   NOOP;