diff --git a/src/applinks.js b/src/applinks.js
index 72cf26e5d..e41e62626 100644
--- a/src/applinks.js
+++ b/src/applinks.js
@@ -146,17 +146,15 @@ async function update(applinkId, applink) {
 
     debug(`update: ${applinkId} ${applink.upstreamUri}`, applink);
 
-    if ('icon' in applink) {
-        if (applink.icon) {
-            if (!validator.isBase64(applink.icon)) throw new BoxError(BoxError.BAD_FIELD, 'icon is not base64');
-            applink.icon = Buffer.from(applink.icon, 'base64');
-        }
+    if (applink.icon) {
+        if (!validator.isBase64(applink.icon)) throw new BoxError(BoxError.BAD_FIELD, 'icon is not base64');
+        applink.icon = Buffer.from(applink.icon, 'base64');
     }
 
     await detectMetaInfo(applink);
 
     const query = 'UPDATE applinks SET label=?, icon=?, upstreamUri=?, tagsJson=?, accessRestrictionJson=? WHERE id = ?';
-    const args = [ applink.label, applink.icon, applink.upstreamUri, applink.tags ? JSON.stringify(applink.tags) : null, applink.accessRestriction ? JSON.stringify(applink.accessRestriction) : null, applinkId ];
+    const args = [ applink.label, applink.icon || null, applink.upstreamUri, applink.tags ? JSON.stringify(applink.tags) : null, applink.accessRestriction ? JSON.stringify(applink.accessRestriction) : null, applinkId ];
 
     const result = await database.query(query, args);
     if (result.affectedRows !== 1) throw new BoxError(BoxError.NOT_FOUND, 'Applink not found');