diff --git a/src/olympic/studio/applib/src/popups/fileinfo.hpp b/src/olympic/studio/applib/src/popups/fileinfo.hpp
index 193f22ba..ec2ac713 100644
--- a/src/olympic/studio/applib/src/popups/fileinfo.hpp
+++ b/src/olympic/studio/applib/src/popups/fileinfo.hpp
@@ -20,7 +20,8 @@ class FileInfo: public ig::Popup {
 			ox::String typeName;
 			int typeVersion{};
 			ox::StringLiteral format;
-			size_t dataSize{};
+			// use manual sizing to work with %ull
+			unsigned long long dataSize{};
 		} m_fileInfo;
 
 	public: