diff --git a/lua.h b/lua.h
index db931825..2452c161 100644
--- a/lua.h
+++ b/lua.h
@@ -2,13 +2,18 @@
 ** LUA - Linguagem para Usuarios de Aplicacao
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: lua.h,v 1.2 1994/08/03 14:15:46 celes Exp celes $
+** $Id: lua.h,v 1.3 1994/08/17 15:05:08 celes Exp celes $
 */
 
 
 #ifndef lua_h
 #define lua_h
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 typedef void (*lua_CFunction) (void);
 typedef struct Object *lua_Object;
 
@@ -56,4 +61,8 @@ int            lua_isfunction 		(lua_Object object);
 int            lua_iscfunction 		(lua_Object object);
 int            lua_isuserdata 		(lua_Object object);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/lualib.h b/lualib.h
index 6150a4da..bb159fe3 100644
--- a/lualib.h
+++ b/lualib.h
@@ -2,15 +2,25 @@
 ** Libraries to be used in LUA programs
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: $
+** $Id: lualib.h,v 1.1 1993/12/17 19:01:46 celes Exp celes $
 */
 
 #ifndef lualib_h
 #define lualib_h
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+ 
+
 void iolib_open   (void);
 void strlib_open  (void);
 void mathlib_open (void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif