diff --git a/src/errors.mjs b/src/errors.mjs
index a5333e9..549970e 100644
--- a/src/errors.mjs
+++ b/src/errors.mjs
@@ -8,5 +8,5 @@ export class CookieParseError extends Error {
 export function paramError(position, paramName, functionName, validTypes) {
     validTypes = [validTypes].flatMap(t => "\"" + t + "\"");
     validTypes = validTypes.slice(0, -1).join(", ") + (validTypes.length > 1 ? " or " : "") + validTypes.slice(-1);
-    return new TypeError(`${position} parameter "${name}" passed to "${functionName}" is not of type ${validTypes}!`);
+    return new TypeError(`${position} parameter "${paramName}" passed to "${functionName}" is not of type ${validTypes}!`);
 }