diff --git a/Packages/Triangulation_2/changes.txt b/Packages/Triangulation_2/changes.txt
index f1e27013145..83250fc611d 100644
--- a/Packages/Triangulation_2/changes.txt
+++ b/Packages/Triangulation_2/changes.txt
@@ -1,6 +1,9 @@
 Package triangulation: provides triangulations Delaunay triangulations, 
 constrained and regular triangulations with  tests and examples.
 
+Ver 4.77 (21/12/00)
+- fixed the signature of flip in Triangulation_2.h
+
 Ver 4.76 (14/12/00 )
 - added the dual power diagram to regular triangulations
 - added a typename in Triangulation_data_structure (default and using list)
diff --git a/Packages/Triangulation_2/demo/Triangulation_2/makefile b/Packages/Triangulation_2/demo/Triangulation_2/makefile
index e2002c02974..f8227088137 100644
--- a/Packages/Triangulation_2/demo/Triangulation_2/makefile
+++ b/Packages/Triangulation_2/demo/Triangulation_2/makefile
@@ -34,22 +34,23 @@ LDFLAGS = \
 #---------------------------------------------------------------------#
 
 all :            \
-	demo regular_demo
+	demo $(EXE_EXT) \
+	regular_demo$(EXE_EXT)
 
 
 demo$(EXE_EXT): demo$(OBJ_EXT) parse$(OBJ_EXT)
 	$(CGAL_CXX) $(LIBPATH) $(EXE_OPT)demo demo$(OBJ_EXT) parse$(OBJ_EXT) $(LDFLAGS)
 
+
 regular_demo$(EXE_EXT): regular_demo$(OBJ_EXT) 
 	$(CGAL_CXX) $(LIBPATH) $(EXE_OPT)regular_demo regular_demo$(OBJ_EXT) $(LDFLAGS)
 
 clean: \
+	regular_demo.clean \
 	demo.clean \
-	parse.clean \
-	regular_demo.clean
-
-
+	parse.clean 
 
+#- rm -f regular_demo$(EXE_EXT) regular_demo$(OBJ_EXT) \
 #---------------------------------------------------------------------#
 #                    suffix rules
 #---------------------------------------------------------------------#
diff --git a/Packages/Triangulation_2/makefile b/Packages/Triangulation_2/makefile
index fc6349b0557..cec4c8b97b8 100644
--- a/Packages/Triangulation_2/makefile
+++ b/Packages/Triangulation_2/makefile
@@ -17,11 +17,11 @@ package:
 	@echo "----------------------------------"
 	@echo "---- cvs update; -----------------"
 	@echo "---- make Test ; ------------ ----"
-	@echo "---- make VERSION=4.76 Doc -------"
+	@echo "---- make VERSION=4.77 Doc -------"
 	@echo "---- editer changes.txt       ----"
-	@echo "---- make VERSION=4.76 Version ---"
+	@echo "---- make VERSION=4.77 Version ---"
 	@echo "---- cvs commit ------------------"
-	@echo "---- make VERSION=4.76 Tag -------"
+	@echo "---- make VERSION=4.77 Tag -------"
 	@echo "---- make Submit -----------------"
 	@echo "----------------------------------"
 
diff --git a/Packages/Triangulation_2/version b/Packages/Triangulation_2/version
index 2685d9d912c..7e684d06835 100644
--- a/Packages/Triangulation_2/version
+++ b/Packages/Triangulation_2/version
@@ -1,2 +1,2 @@
-4.76 (14 Dec 2000)
+4.77 (21 Dec 2000)
 maintainer : Mariette Yvinec <Mariette.Yvinec@sophia.inria.fr>