diff --git a/ChangeLog b/ChangeLog
index 1a1755e3c9..eb9c051b8c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Dec  9 14:45:27 2015  Koichi Sasada  <ko1@atdot.net>
+
+	* gc.c (gc_mark_stacked_objects): fix typo.
+	  reported by XIE Zhibang. [Bug #11763]
+
 Wed Dec  9 14:37:51 2015  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* doc/syntax/refinements.rdoc: remove outdated description.
diff --git a/gc.c b/gc.c
index 2ac4386376..fc8963c10a 100644
--- a/gc.c
+++ b/gc.c
@@ -4515,7 +4515,7 @@ gc_mark_stacked_objects(rb_objspace_t *objspace, int incremental, size_t count)
     mark_stack_t *mstack = &objspace->mark_stack;
     VALUE obj;
 #if GC_ENABLE_INCREMENTAL_MARK
-    size_t marked_slots_at_the_beggining = objspace->marked_slots;
+    size_t marked_slots_at_the_beginning = objspace->marked_slots;
     size_t popped_count = 0;
 #endif
 
@@ -4535,7 +4535,7 @@ gc_mark_stacked_objects(rb_objspace_t *objspace, int incremental, size_t count)
 	    CLEAR_IN_BITMAP(GET_HEAP_MARKING_BITS(obj), obj);
 	    popped_count++;
 
-	    if (popped_count + (objspace->marked_slots - marked_slots_at_the_beggining) > count) {
+	    if (popped_count + (objspace->marked_slots - marked_slots_at_the_beginning) > count) {
 		break;
 	    }
 	}