diff --git a/pcsx2-qt/Settings/MemoryCardSettingsWidget.cpp b/pcsx2-qt/Settings/MemoryCardSettingsWidget.cpp
index 87afffe518..7063d0f49f 100644
--- a/pcsx2-qt/Settings/MemoryCardSettingsWidget.cpp
+++ b/pcsx2-qt/Settings/MemoryCardSettingsWidget.cpp
@@ -138,7 +138,7 @@ void MemoryCardSettingsWidget::autoSizeUI()
 void MemoryCardSettingsWidget::tryInsertCard(u32 slot, const QString& newCard)
 {
 	// handle where the card is dragged in from explorer or something
-	const int lastSlashPos = std::max(newCard.lastIndexOf('/'), newCard.lastIndexOf('\\'));
+	const qsizetype lastSlashPos = std::max(newCard.lastIndexOf('/'), newCard.lastIndexOf('\\'));
 	const std::string newCardStr(
 		(lastSlashPos >= 0) ? newCard.mid(0, lastSlashPos).toStdString() : newCard.toStdString());
 	if (newCardStr.empty())