diff --git a/gc.c b/gc.c
index d16e2ae..c89811b 100644
--- a/gc.c
+++ b/gc.c
@@ -4513,7 +4513,7 @@ 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
 
@@ -4533,7 +4533,7 @@ 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;
 	    }
 	}