diff --git a/lbuiltin.c b/lbuiltin.c
index bd8647e8..51bea491 100644
--- a/lbuiltin.c
+++ b/lbuiltin.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lbuiltin.c,v 1.86 1999/12/20 13:10:38 roberto Exp roberto $
+** $Id: lbuiltin.c,v 1.87 1999/12/23 18:19:57 roberto Exp roberto $
 ** Built-in functions
 ** See Copyright Notice in lua.h
 */
@@ -107,7 +107,7 @@ void luaB_ERRORMESSAGE (lua_State *L) {
   lua_Object al = lua_rawgetglobal(L, "_ALERT");
   if (lua_isfunction(L, al)) {  /* avoid error loop if _ALERT is not defined */
     char buff[600];
-    sprintf(buff, "lua error: %.500s\n", luaL_check_string(L, 1));
+    sprintf(buff, "error: %.500s\n", luaL_check_string(L, 1));
     lua_pushstring(L, buff);
     lua_callfunction(L, al);
   }
diff --git a/liolib.c b/liolib.c
index e2bac28c..a99820f6 100644
--- a/liolib.c
+++ b/liolib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 1.51 1999/11/22 13:12:07 roberto Exp roberto $
+** $Id: liolib.c,v 1.52 1999/11/22 17:39:51 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -533,7 +533,7 @@ static void errorfb (lua_State *L) {
   char buff[MAXMESSAGE];
   int level = 1;  /* skip level 0 (it's this function) */
   lua_Object func;
-  sprintf(buff, "lua error: %.200s\n", lua_getstring(L, lua_getparam(L, 1)));
+  sprintf(buff, "error: %.200s\n", lua_getstring(L, lua_getparam(L, 1)));
   while ((func = lua_stackedfunction(L, level++)) != LUA_NOOBJECT) {
     const char *name;
     int currentline;