diff --git a/lib/wasmstandalone/src/standalone.rs b/lib/wasmstandalone/src/standalone.rs
index 31dbfe3d84..7ab7afecea 100644
--- a/lib/wasmstandalone/src/standalone.rs
+++ b/lib/wasmstandalone/src/standalone.rs
@@ -334,6 +334,7 @@ impl WasmRuntime for Runtime {
         self.has_current_memory = None;
         self.has_grow_memory = None;
         self.func_indices.clear();
+        self.the_heap = PackedOption::default();
     }
     fn declare_global(&mut self, global: Global) {
         debug_assert!(!self.instantiated);