diff --git a/main.js b/main.js
index a3ed6e6..2ae4635 100644
--- a/main.js
+++ b/main.js
@@ -112,7 +112,7 @@ function compute(queue, modulus) {
 		throw new Error("error evaluating expression");
 	}
 
-	let result = stack[0];
+	let result = stack[0] % modulus;
 	if (result < 0n) {
 		result += modulus;
 	}