diff --git a/Changes b/Changes
index cbbdb9a..a9a33c9 100644
--- a/Changes
+++ b/Changes
@@ -40,6 +40,9 @@ Release ...
 * Ex does not exit on errors immediately anymore if standard input is not
   a terminal but a pipe or regular file.
 * The 'substitute' ex command can now be abbreviated as 'sub', 'subst' etc.
+* Fixed an error in the realloc() function in mapmalloc.c that sometimes
+  caused memory to be overwritten because memcpy(new, old, size) was called
+  with the size of 'new' if 'new' was larger than 'old'.
 
 Release 1/19/05
 * The last release erroneously made 'X' work like 'x' in visual mode. It now
diff --git a/mapmalloc.c b/mapmalloc.c
index 8c8f117..90f8c30 100644
--- a/mapmalloc.c
+++ b/mapmalloc.c
@@ -5,7 +5,7 @@
  * September 2001.
  */
 
-/*	Sccsid @(#)mapmalloc.c	1.14 (gritter) 11/26/04	*/
+/*	Sccsid @(#)mapmalloc.c	1.15 (gritter) 2/17/05	*/
 
 /* ====================================================================
  * Copyright (c) 1999-2000 Ralf S. Engelschall. All rights reserved.
@@ -508,7 +508,7 @@ realloc(char *ptr, size_t usize)
 	}
 	if ((vp = malloc(usize)) == NULL)
 		return NULL;
-	memcpy(vp, ptr, usize);
+	memcpy(vp, ptr, mc->mc_usize);
 	free(ptr);
 	return vp;
 }