diff --git a/src/r_main.c b/src/r_main.c
index 9a3d98870..e47bb06e3 100644
--- a/src/r_main.c
+++ b/src/r_main.c
@@ -1388,7 +1388,7 @@ void R_RenderPlayerView(player_t *player)
 	else
 	{
 		portalclipstart = 0;
-		portalclipend = viewwidth-1;
+		portalclipend = viewwidth;
 		R_ClearClipSegs();
 	}
 	R_ClearDrawSegs();
diff --git a/src/r_things.c b/src/r_things.c
index 61bd17cb9..31326ef72 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -1688,7 +1688,7 @@ static void R_ProjectSprite(mobj_t *thing)
 	// PORTAL SPRITE CLIPPING
 	if (portalrender && portalclipline)
 	{
-		if (x2 < portalclipstart || x1 > portalclipend)
+		if (x2 < portalclipstart || x1 >= portalclipend)
 			return;
 
 		if (P_PointOnLineSide(thing->x, thing->y, portalclipline) != 0)
@@ -1958,7 +1958,7 @@ static void R_ProjectPrecipitationSprite(precipmobj_t *thing)
 	// PORTAL SPRITE CLIPPING
 	if (portalrender && portalclipline)
 	{
-		if (x2 < portalclipstart || x1 > portalclipend)
+		if (x2 < portalclipstart || x1 >= portalclipend)
 			return;
 
 		if (P_PointOnLineSide(thing->x, thing->y, portalclipline) != 0)