diff --git a/src/App/Metadata.cpp b/src/App/Metadata.cpp
index e3f1a22dc6..ce0796bf7b 100644
--- a/src/App/Metadata.cpp
+++ b/src/App/Metadata.cpp
@@ -61,6 +61,7 @@ namespace MetadataInternal {
         void warning(const SAXParseException& toCatch)
         {
             // Don't deal with warnings at all
+            std::ignore = toCatch;
         }
 
         void error(const SAXParseException& toCatch)