diff --git a/Source/Core/DolphinQt/Debugger/WatchWidget.h b/Source/Core/DolphinQt/Debugger/WatchWidget.h
index 922f7c6b22..4741a5ed0a 100644
--- a/Source/Core/DolphinQt/Debugger/WatchWidget.h
+++ b/Source/Core/DolphinQt/Debugger/WatchWidget.h
@@ -54,5 +54,5 @@ private:
 
   bool m_updating = false;
 
-  static constexpr size_t NUM_COLUMNS = 6;
+  static constexpr int NUM_COLUMNS = 6;
 };