diff --git a/src/simulator/api-wasm/src/lib.rs b/src/simulator/api-wasm/src/lib.rs
index 3f32b7bc..98a46efc 100644
--- a/src/simulator/api-wasm/src/lib.rs
+++ b/src/simulator/api-wasm/src/lib.rs
@@ -254,6 +254,12 @@ pub struct WasmEcologyPhysics {
     inner: EcologyPhysics,
 }
 
+impl Default for WasmEcologyPhysics {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 #[wasm_bindgen]
 impl WasmEcologyPhysics {
     #[wasm_bindgen(constructor)]