diff --git a/src/Native/gc/gc.cpp b/src/Native/gc/gc.cpp
index a3b3fc771cb..be21bfd9197 100644
--- a/src/Native/gc/gc.cpp
+++ b/src/Native/gc/gc.cpp
@@ -19982,6 +19982,7 @@ gc_heap::background_mark_simple (uint8_t* o THREAD_NUMBER_DCL)
                 background_mark_simple1 (o THREAD_NUMBER_ARG);
             }
         }
+        allow_fgc();
     }
 }