diff --git a/index.src.html b/index.src.html
index 893d83c1..38ed48ad 100644
--- a/index.src.html
+++ b/index.src.html
@@ -4175,12 +4175,14 @@
         4. Let |displayHeight| be
             `|frame|'s {{VideoFrame/[[visible height]]}} * |heightScale|`,
             rounded to the nearest integer.
-        5. If |rotation| is equal to `0` or `180`:
+        5. If |displayWidth| is equal to `0` or |displayHeight| is equal to `0`,
+            throw a {{TypeError}}.
+        6. If |rotation| is equal to `0` or `180`:
             1. Assign |displayWidth| to |frame|'s
                 {{VideoFrame/[[display width]]}}.
             2. Assign |displayHeight| to |frame|'s
                 {{VideoFrame/[[display height]]}}.
-        6. Otherwise:
+        7. Otherwise:
             1. Assign |displayHeight| to |frame|'s
                 {{VideoFrame/[[display width]]}}.
             2. Assign |displayWidth| to |frame|'s