diff --git a/frontend/src/Settings/MediaManagement/RootFolder/EditRootFolderModalContent.js b/frontend/src/Settings/MediaManagement/RootFolder/EditRootFolderModalContent.js
index 04c5012e2..a1e13c534 100644
--- a/frontend/src/Settings/MediaManagement/RootFolder/EditRootFolderModalContent.js
+++ b/frontend/src/Settings/MediaManagement/RootFolder/EditRootFolderModalContent.js
@@ -127,6 +127,7 @@ function EditRootFolderModalContent(props) {
 
                 <FormInputGroup
                   type={inputTypes.CHECK}
+                  isDisabled={!!id}
                   name="isCalibreLibrary"
                   helpText={translate('IsCalibreLibraryHelpText')}
                   {...isCalibreLibrary}