diff --git a/src/gc.c b/src/gc.c
index e892a6749..b23e4869e 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -734,6 +734,7 @@ obj_free(mrb_state *mrb, struct RBasic *obj)
           }
           ci--;
         }
+        mrb_free_context(mrb, c);
       }
     }
     break;