diff --git a/src/ChangeLog b/src/ChangeLog
index 78bd22db812..f0cc70192b9 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2010-07-25  Ken Brown  <kbrown@cornell.edu>
+
+	* vm-limit.c (check_memory_limits): Fix previous change;
+	accidentally reverted an earlier change.
+
 2010-07-25  Ken Brown  <kbrown@cornell.edu>
 
 	* mem-limits.h (BSD4_2) [cygwin]: Don't define here; instead...
diff --git a/src/vm-limit.c b/src/vm-limit.c
index a08c300c14d..71ad82d687e 100644
--- a/src/vm-limit.c
+++ b/src/vm-limit.c
@@ -173,9 +173,9 @@ static void
 check_memory_limits (void)
 {
 #ifdef REL_ALLOC
-  extern POINTER (*real_morecore) ();
+  extern POINTER (*real_morecore) (SIZE);
 #endif
-  extern POINTER (*__morecore) ();
+  extern POINTER (*__morecore) (SIZE);
 
   register POINTER cp;
   unsigned long five_percent;