diff --git a/src/common/engine/d_event.cpp b/src/common/engine/d_event.cpp
index dd23c6e0d..f851bb49e 100644
--- a/src/common/engine/d_event.cpp
+++ b/src/common/engine/d_event.cpp
@@ -52,7 +52,6 @@ event_t events[MAXEVENTS];
 
 CVAR(Float, m_sensitivity_x, 4, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 CVAR(Float, m_sensitivity_y, 2, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
-CVAR(Bool, m_filter, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 
 
 //==========================================================================
@@ -165,24 +164,11 @@ void D_PostEvent(event_t* ev)
 
 void PostMouseMove(int xx, int yy)
 {
-	static float lastx = 0, lasty = 0;
 	event_t ev{};
 
-	float x = float(xx) * m_sensitivity_x;
-	float y = -float(yy) * m_sensitivity_y;
+	ev.x = float(xx) * m_sensitivity_x;
+	ev.y = -float(yy) * m_sensitivity_y;
 
-	if (m_filter)
-	{
-		ev.x = (x + lastx) / 2;
-		ev.y = (y + lasty) / 2;
-	}
-	else
-	{
-		ev.x = x;
-		ev.y = y;
-	}
-	lastx = x;
-	lasty = y;
 	if (ev.x || ev.y)
 	{
 		ev.type = EV_Mouse;
diff --git a/src/common/platform/win32/i_input.h b/src/common/platform/win32/i_input.h
index 433c1f2c6..643cc65b3 100644
--- a/src/common/platform/win32/i_input.h
+++ b/src/common/platform/win32/i_input.h
@@ -82,7 +82,6 @@ protected:
 	void ClearButtonState();
 
 	int WheelMove[2];
-	int LastX, LastY;	// for m_filter
 	int ButtonState;	// bit mask of current button states (1=down, 0=up)
 };
 
diff --git a/src/common/platform/win32/i_mouse.cpp b/src/common/platform/win32/i_mouse.cpp
index 4c2673e35..58cac26c2 100644
--- a/src/common/platform/win32/i_mouse.cpp
+++ b/src/common/platform/win32/i_mouse.cpp
@@ -305,7 +305,6 @@ void I_CheckNativeMouse(bool preferNative, bool eventhandlerresult)
 
 FMouse::FMouse()
 {
-	LastX = LastY = 0;
 	ButtonState = 0;
 	WheelMove[0] = 0;
 	WheelMove[1] = 0;