diff --git a/src/groth16.js b/src/groth16.js
index 1752d73..ddd3989 100644
--- a/src/groth16.js
+++ b/src/groth16.js
@@ -250,7 +250,7 @@ async function build(params) {
         const copyCode = groth16_wasm.code.buffer.slice(0);
         initPromises.push(groth16.postAction(i, {
             command: "INIT",
-            init: wasmInitialMemory,
+            init: defaultParams.wasmInitialMemory,
             code: copyCode
 
         }, [copyCode]));