diff --git a/bindings/matrix-sdk-crypto-js/scripts/build.sh b/bindings/matrix-sdk-crypto-js/scripts/build.sh
index 401e58851..15e8fce6a 100755
--- a/bindings/matrix-sdk-crypto-js/scripts/build.sh
+++ b/bindings/matrix-sdk-crypto-js/scripts/build.sh
@@ -19,7 +19,7 @@ set -e
 RUSTFLAGS='-C opt-level=z' WASM_BINDGEN_WEAKREF=1 wasm-pack build --release --target nodejs --scope matrix-org --out-dir pkg
 
 # Convert the Wasm into a JS file that exports the base64'ed Wasm.
-echo "module.exports = '$(base64 pkg/matrix_sdk_crypto_js_bg.wasm)';" > pkg/matrix_sdk_crypto_js_bg.wasm.js
+echo "module.exports = \`$(base64 pkg/matrix_sdk_crypto_js_bg.wasm)\`;" > pkg/matrix_sdk_crypto_js_bg.wasm.js
 
 echo 'HEAD:';
 head -c 30 pkg/matrix_sdk_crypto_js_bg.wasm.js