diff --git a/index.bs b/index.bs
index 087952ad..f56ab521 100644
--- a/index.bs
+++ b/index.bs
@@ -1872,6 +1872,7 @@ partial interface MLGraphBuilder {
     1. Otherwise, if |options|.{{MLConv2dOptions/dilations}}'s [=list/size=] is not 2, then [=exception/throw=] a {{TypeError}}.
     1. If |options|.{{MLConv2dOptions/groups}} is 0, then [=exception/throw=] a {{TypeError}}.
     1. *Calculate the output shape:*
+        1. Let |inputShape| be |input|'s [=MLOperand/shape=].
         1. Switch on |options|.{{MLConv2dOptions/inputLayout}}:
             <dl class=switch>
                 : {{MLInputOperandLayout/"nchw"}}
@@ -2085,6 +2086,7 @@ partial interface MLGraphBuilder {
     1. Otherwise:
         1. If |options|.{{MLConvTranspose2dOptions/outputPadding}}[0] is greater than or equal to |options|.{{MLConvTranspose2dOptions/strides}}[0], or |options|.{{MLConvTranspose2dOptions/outputPadding}}[1] is greater than or equal to |options|.{{MLConvTranspose2dOptions/strides}}[1], then [=exception/throw=] a {{TypeError}}.
     1. *Calculate the output shape:*
+        1. Let |inputShape| be |input|'s [=MLOperand/shape=].
         1. Switch on |options|.{{MLConvTranspose2dOptions/inputLayout}}:
             <dl class=switch>
                 : {{MLInputOperandLayout/"nchw"}}