diff --git a/source/in_svgalib.c b/source/in_svgalib.c
index 47b77ca..97d2cd1 100644
--- a/source/in_svgalib.c
+++ b/source/in_svgalib.c
@@ -133,7 +133,7 @@ void
 IN_Init_Cvars (void)
 {
 	JOY_Init_Cvars ();
-	m_filter = Cvar_Get ("m_filter", "0", 0, "Toggle mouse input filtering.");
+	m_filter = Cvar_Get ("m_filter", "0", CVAR_NONE, NULL, "Toggle mouse input filtering.");
 }
 
 static void