diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2bc44a9ef4bd..ce3514b41fcc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -2,6 +2,8 @@ Sun Jan 17 21:04:31 1999  Richard Henderson  <rth@cygnus.com>
 
 	* jump.c (rtx_renumbered_equal_p): Special case CODE_LABEL.
 
+	* system.h (bcopy): Implement with memmove not memcpy.
+
 Sun Jan 17 19:23:20 1999  Jeffrey A Law  (law@cygnus.com)
 
 	* Makefile.in (cppulp.o): Add dependencies.
diff --git a/gcc/system.h b/gcc/system.h
index 12c0a775d6ee..4e11218c77f9 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -220,7 +220,7 @@ extern int errno;
 extern void bcopy ();
 #  endif
 # else /* ! HAVE_BCOPY */
-#  define bcopy(src,dst,len) memcpy ((dst),(src),(len))
+#  define bcopy(src,dst,len) memmove((dst),(src),(len))
 # endif
 #endif