diff --git a/qrenderdoc/Widgets/BufferFormatSpecifier.cpp b/qrenderdoc/Widgets/BufferFormatSpecifier.cpp
index ac6a480ec..59f769d6b 100644
--- a/qrenderdoc/Widgets/BufferFormatSpecifier.cpp
+++ b/qrenderdoc/Widgets/BufferFormatSpecifier.cpp
@@ -69,6 +69,7 @@ void BufferFormatList::setFormat(QString name, QString format)
   for(QString k : keys)
     saved.push_back(k + lit("\n") + formats[k]);
   m_Ctx.Config().BufferFormatter_SavedFormats = saved;
+  m_Ctx.Config().Save();
 }
 
 BufferFormatSpecifier::BufferFormatSpecifier(QWidget *parent)