diff --git a/Source/Project64-core/N64System/Mips/SystemTiming.h b/Source/Project64-core/N64System/Mips/SystemTiming.h
index 8d01ebb77..4f916a6a1 100644
--- a/Source/Project64-core/N64System/Mips/SystemTiming.h
+++ b/Source/Project64-core/N64System/Mips/SystemTiming.h
@@ -36,7 +36,11 @@ public:
 
     struct TIMER_DETAILS
     {
-        bool    Active;
+        union 
+        {
+            int64_t reserved;
+            bool Active;
+        };
         int64_t CyclesToTimer;
     };