diff --git a/src/preferences/filetypes/ApplicationTypeWindow.cpp b/src/preferences/filetypes/ApplicationTypeWindow.cpp
index 63387428a9..74d313771e 100644
--- a/src/preferences/filetypes/ApplicationTypeWindow.cpp
+++ b/src/preferences/filetypes/ApplicationTypeWindow.cpp
@@ -810,7 +810,7 @@ ApplicationTypeWindow::_NeedsSaving(uint32 _flags) const
 	}
 
 	if (_flags & CHECK_TYPES) {
-		if (!fOriginalInfo.supportedTypes.CompareData(_SupportedTypes()))
+		if (!fOriginalInfo.supportedTypes.HasSameData(_SupportedTypes()))
 			flags |= CHECK_TYPES;
 		else
 			flags &= ~CHECK_TYPES;