diff --git a/spec.bs b/spec.bs
index 165fc6fb4..55eee1463 100644
--- a/spec.bs
+++ b/spec.bs
@@ -832,15 +832,12 @@ To <dfn>construct a pending fenced frame config</dfn> given an [=auction config=
     : [=mapped url/visibility=]
     :: "<a for=visibility>`opaque`</a>"
 
-  : [=fenced frame config/container size=]
+  : [=fenced frame config/content size=]
   :: the result of
 
    Issue: converting |config|'s [=auction config/requested size=] to pixel values
    (<a href="https://github.com/WICG/turtledove/issues/986">WICG/turtledove#986</a>)
 
-  : [=fenced frame config/content size=]
-  :: null
-
   : [=fenced frame config/interest group descriptor=]
   :: a [=struct=] with the following [=struct/items=]:
     : [=interest group descriptor/value=]
@@ -1068,9 +1065,6 @@ To <dfn>create nested configs</dfn> given [=generated bid/ad component descripto
       : [=mapped url/visibility=]
       :: "<a for=visibility>`opaque`</a>"
 
-    : [=fenced frame config/container size=]
-    :: null
-
     : [=fenced frame config/content size=]
     :: If |adComponentDescriptor|'s [=ad descriptor/size=] is null, then null. Otherwise, a
        [=struct=] with the following [=struct/items=]: