diff --git a/ving/docs/change-log.md b/ving/docs/change-log.md
index 6606ce24..7b5f2d56 100644
--- a/ving/docs/change-log.md
+++ b/ving/docs/change-log.md
@@ -9,6 +9,7 @@ outline: deep
  * Fix a bug in redis client where it wouldn't connect to the AWS valkey/redis cluster.
  * Fix a hydration mismatch in form inputs subtext.
  * Fix a hydration mismatch in markdown inputs.
+ * Added error hanlding to verifyExtension() in S3File.
 
 ### 2024-10-24
  * Installed dotenv for environment variables.
diff --git a/ving/record/records/S3File.mjs b/ving/record/records/S3File.mjs
index 3e9640b3..0398738e 100644
--- a/ving/record/records/S3File.mjs
+++ b/ving/record/records/S3File.mjs
@@ -221,6 +221,8 @@ export class S3FileRecord extends VingRecord {
          * await s3file.verifyExtension(['png','gif','jpeg','jpg'])
          */
     async verifyExtension(whitelist, errorOnly = false) {
+        if (!isArray(whitelist))
+            throw ving.ouch(500, 'The whitelist must be an array of allowed file extensions defined in the ving schema.');
         if (!whitelist.includes(this.get('extension')))
             await this.markVerifiyFailed(`${this.get('filename')} needs to be one of ${whitelist.join(', ')}.`, errorOnly);
         return true;