diff --git a/Source/Project64-core/N64System/Mips/SystemTiming.cpp b/Source/Project64-core/N64System/Mips/SystemTiming.cpp
index 83f2f7b8e..0bc492da3 100644
--- a/Source/Project64-core/N64System/Mips/SystemTiming.cpp
+++ b/Source/Project64-core/N64System/Mips/SystemTiming.cpp
@@ -15,7 +15,7 @@
 #include <Project64-core/N64System/N64Class.h>
 #include <Project64-core/3rdParty/zip.h>
 
-CSystemTimer::CSystemTimer(int & NextTimer) :
+CSystemTimer::CSystemTimer( int32_t & NextTimer ) :
 m_NextTimer(NextTimer),
 m_inFixTimer(false)
 {
diff --git a/Source/Project64-core/N64System/Mips/SystemTiming.h b/Source/Project64-core/N64System/Mips/SystemTiming.h
index 45381f9ba..a9b98efb9 100644
--- a/Source/Project64-core/N64System/Mips/SystemTiming.h
+++ b/Source/Project64-core/N64System/Mips/SystemTiming.h
@@ -39,7 +39,7 @@ public:
     };
 
 public:
-    CSystemTimer(int & NextTimer);
+    CSystemTimer(int32_t & NextTimer);
     void      SetTimer(TimerType Type, uint32_t Cycles, bool bRelative);
     uint32_t  GetTimer(TimerType Type);
     void      StopTimer(TimerType Type);
@@ -65,8 +65,8 @@ private:
     CSystemTimer& operator=(const CSystemTimer&); // Disable assignment
 
     TIMER_DETAILS m_TimerDetatils[MaxTimer];
-    int           m_LastUpdate; //Timer at last update
-    int         & m_NextTimer;
+    int32_t       m_LastUpdate; //Timer at last update
+    int32_t     & m_NextTimer;
     TimerType     m_Current;
     bool          m_inFixTimer;