diff --git a/Plugins/UniversalEditor.Plugins.FileSystem/Associations/ISO9660.uexml b/Plugins/UniversalEditor.Plugins.FileSystem/Associations/ISO9660.uexml
index 39e88d80..19223b56 100644
--- a/Plugins/UniversalEditor.Plugins.FileSystem/Associations/ISO9660.uexml
+++ b/Plugins/UniversalEditor.Plugins.FileSystem/Associations/ISO9660.uexml
@@ -3,7 +3,7 @@
 	<Associations>
 		<Association>
 			<Filters>
-				<Filter Title="ISO 9660 optical disc image">
+				<Filter Title="ISO 9660 optical disc image" ContentType="application/x-iso9660-image" HintComparison="MagicThenFilter">
 					<FileNameFilters>
 						<FileNameFilter>*.iso</FileNameFilter>
 					</FileNameFilters>
diff --git a/Plugins/UniversalEditor.Plugins.FileSystem/Associations/NeroDiscImage.uexml b/Plugins/UniversalEditor.Plugins.FileSystem/Associations/NeroDiscImage.uexml
index 0ee170c1..e0f93d08 100644
--- a/Plugins/UniversalEditor.Plugins.FileSystem/Associations/NeroDiscImage.uexml
+++ b/Plugins/UniversalEditor.Plugins.FileSystem/Associations/NeroDiscImage.uexml
@@ -3,7 +3,7 @@
 	<Associations>
 		<Association>
 			<Filters>
-				<Filter Title="Nero Burning ROM disc image">
+				<Filter Title="Nero Burning ROM disc image" HintComparison="MagicThenFilter">
 					<FileNameFilters>
 						<FileNameFilter>*.nrb</FileNameFilter>
 						<FileNameFilter>*.nri</FileNameFilter>