diff --git a/toolkit/mozapps/extensions/src/nsExtensionManager.js.in b/toolkit/mozapps/extensions/src/nsExtensionManager.js.in
index edd9e9c5298..7d267e7b66a 100644
--- a/toolkit/mozapps/extensions/src/nsExtensionManager.js.in
+++ b/toolkit/mozapps/extensions/src/nsExtensionManager.js.in
@@ -6529,8 +6529,8 @@ RDFItemUpdater.prototype = {
           aUpdateData.version = version;
           aUpdateData.updateLink = this._getPropertyFromResource(aDataSource, targetApp, "updateLink", aLocalItem);
           aUpdateData.updateHash = this._getPropertyFromResource(aDataSource, targetApp, "updateHash", aLocalItem);
-          aUpdateData.minVersion = maxAppVersion;
-          aUpdateData.maxVersion = minAppVersion;
+          aUpdateData.minVersion = minAppVersion;
+          aUpdateData.maxVersion = maxAppVersion;
         }
       }
     }