diff --git a/src/ChangeLog b/src/ChangeLog
index 43e1f9dbc06..3d137a16a4c 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2011-06-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* vm-limit.c (check_memory_limits): Fix incorrect extern function decls.
+	* mem-limits.h (SIZE): Remove; no longer used.
+
 2011-06-13  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* xterm.c (x_alloc_nearest_color_1): Prefer int to long when int works.
diff --git a/src/mem-limits.h b/src/mem-limits.h
index aa3a13c1c34..86b2f44846d 100644
--- a/src/mem-limits.h
+++ b/src/mem-limits.h
@@ -33,8 +33,6 @@ extern int etext;
 # endif
 #endif
 
-typedef unsigned long SIZE;
-
 extern char *start_of_data (void);
 #if defined USE_LSB_TAG
 #define EXCEEDS_LISP_PTR(ptr) 0
diff --git a/src/vm-limit.c b/src/vm-limit.c
index 4694608602f..846946b41c1 100644
--- a/src/vm-limit.c
+++ b/src/vm-limit.c
@@ -166,9 +166,9 @@ static void
 check_memory_limits (void)
 {
 #ifdef REL_ALLOC
-  extern POINTER (*real_morecore) (SIZE);
+  extern POINTER (*real_morecore) (long);
 #endif
-  extern POINTER (*__morecore) (SIZE);
+  extern POINTER (*__morecore) (long);
 
   register POINTER cp;
   unsigned long five_percent;
@@ -297,4 +297,3 @@ memory_warnings (POINTER start, void (*warnfun) (const char *))
   /* Force data limit to be recalculated on each run.  */
   lim_data = 0;
 }
-