diff --git a/src/r_defs.h b/src/r_defs.h
index a982a598b..107b8a83f 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -675,7 +675,7 @@ typedef struct drawseg_s
 	INT32 numthicksides;
 	fixed_t frontscale[MAXVIDWIDTH];
 
-	UINT8 portalpass; // if > 0 and == portalrender, do not clip sprites
+	UINT8 portalpass; // if > 0 and <= portalrender, do not affect sprite clipping
 
 #ifdef ESLOPE
 	fixed_t maskedtextureheight[MAXVIDWIDTH]; // For handling sloped midtextures
diff --git a/src/r_things.c b/src/r_things.c
index 667a26e0f..3767b02be 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -2058,7 +2058,7 @@ void R_ClipSprites(void)
 				continue;
 			}
 
-			if (ds->portalpass > 0 && ds->portalpass == portalrender)
+			if (ds->portalpass > 0 && ds->portalpass <= portalrender)
 				continue; // is a portal
 
 			r1 = ds->x1 < spr->x1 ? spr->x1 : ds->x1;