diff --git a/src/engine/sys_mainwind.cpp b/src/engine/sys_mainwind.cpp
index b08353e2..8fb7d3ce 100644
--- a/src/engine/sys_mainwind.cpp
+++ b/src/engine/sys_mainwind.cpp
@@ -121,12 +121,12 @@ void CGame::GetWindowRect(int* const x, int* const y, int* const w, int* const h
 //-----------------------------------------------------------------------------
 // Purpose: dispatch key event
 //-----------------------------------------------------------------------------
-void CGame::DispatchKeyEvent(const uint64_t msTime, const ButtonCode_t buttonCode) const
+void CGame::DispatchKeyEvent(const uint64_t currentTick, const ButtonCode_t buttonCode) const
 {
-	const float duration = buttonCode == KEY_XBUTTON_BACK ? 1.0f : 0.2f;
+	const float delay = buttonCode == KEY_XBUTTON_BACK ? 1.0f : 0.2f;
 	KeyInfo_t& keyInfo = g_pKeyInfo[buttonCode];
 
-	if (keyInfo.m_bKeyDown && ((msTime - keyInfo.m_nEventTick) * 0.001f) >= duration)
+	if (!keyInfo.m_bKeyDown && ((currentTick - keyInfo.m_nEventTick) * 0.001f) >= delay)
 	{
 		KeyEvent_t keyEvent;
 
diff --git a/src/engine/sys_mainwind.h b/src/engine/sys_mainwind.h
index a4451beb..76745149 100644
--- a/src/engine/sys_mainwind.h
+++ b/src/engine/sys_mainwind.h
@@ -34,7 +34,7 @@ public:
 	inline float GetTVRefreshRate() const // Avoid stutter on TV's running on broadcast frame rates.
 	{ return ((float)m_iDesktopRefreshRate == 59.0f || (float)m_iDesktopRefreshRate == 60.0f) ? 59.939999f : (float)m_iDesktopRefreshRate; }
 
-	void DispatchKeyEvent(const uint64_t msTime, const ButtonCode_t buttonCode) const;
+	void DispatchKeyEvent(const uint64_t currentTick, const ButtonCode_t buttonCode) const;
 	void DispatchAllStoredGameMessages() const;
 
 private: