diff --git a/src/gl/scene/gl_walls.cpp b/src/gl/scene/gl_walls.cpp
index b5317dc2a..9856f1d02 100644
--- a/src/gl/scene/gl_walls.cpp
+++ b/src/gl/scene/gl_walls.cpp
@@ -1261,7 +1261,7 @@ void GLWall::ClipFFloors(seg_t * seg, F3DFloor * ffloor, sector_t * frontsector,
 		F3DFloor * rover=frontffloors[i];
 		if (!(rover->flags&FF_EXISTS)) continue;
 		if (!(rover->flags&FF_RENDERSIDES)) continue;
-		if ((rover->flags&flags)!=flags) continue;
+		if ((rover->flags&(FF_SWIMMABLE|FF_TRANSLUCENT))!=flags) continue;
 
 		fixed_t ff_topleft;
 		fixed_t ff_topright;