diff --git a/src/verifyAndStoreOptionValue.ts b/src/verifyAndStoreOptionValue.ts
index b69f127..c341cf0 100644
--- a/src/verifyAndStoreOptionValue.ts
+++ b/src/verifyAndStoreOptionValue.ts
@@ -10,6 +10,10 @@ function execWithCustomError(func: (...args: any[]) => any, showError: (error: E
   }
 }
 
+/**
+ * Verifies that the given value is a valid value for this option, and throws an error otherwise.
+ * Also updates state variables if the value is correct.
+ */
 export default function verifyAndStoreOptionValue({
   option,
   value,
@@ -24,7 +28,7 @@ export default function verifyAndStoreOptionValue({
   message: IOption['message'],
   outputArgs: IState['outputArgs'],
   requiredOptions: IState['requiredOptions'],
-}) {
+}): void {
   //Verify value for correctness
   const verifyValue = execWithCustomError(verify.bind(null, value), (error) => `Invalid value set for option "${option}", the validation of "${value}" failed: ${String(error)}`);
   if (verifyValue !== true) {