diff --git a/src/memory.cpp b/src/memory.cpp
index 15118817..cd75a9bc 100644
--- a/src/memory.cpp
+++ b/src/memory.cpp
@@ -226,8 +226,8 @@ struct MemoryPool{
         PK_GLOBAL_SCOPE_LOCK();
         _arenas.apply([this](Arena* arena){
             if(arena->full()){
-                delete arena;
                 _arenas.erase(arena);
+                delete arena;
             }
         });
     }