diff --git a/HISTORY b/HISTORY
index f1e54de..27cdcec 100755
--- a/HISTORY
+++ b/HISTORY
@@ -1,3 +1,6 @@
+Aug. 9 2016
+Fixed a multiple disposing bug with GC
+
 Aug. 7 2016
 Refactored to return UNKNOWN when trying to access a not exist member in a prototype
 
diff --git a/core/my_basic.c b/core/my_basic.c
index 48b539a..2664493 100755
--- a/core/my_basic.c
+++ b/core/my_basic.c
@@ -5861,7 +5861,7 @@ static void _gc_add(_ref_t* ref, void* data, _gc_t* gc) {
 		return;
 
 	if(gc && _ht_find(gc->collected_table, ref))
-		return;
+		_ht_remove(gc->collected_table, ref, 0);
 
 	if(!gc->table)
 		return;
diff --git a/sample/yard/start.bas b/sample/yard/start.bas
index 98f18ad..8986e89 100644
--- a/sample/yard/start.bas
+++ b/sample/yard/start.bas
@@ -6,6 +6,7 @@
 import "level.bas"
 import "player.bas"
 
+cls()
 print "Welcome to Yet Another RPG Dungeon!";
 
 level.create()