diff --git a/css-shapes-1/Overview.bs b/css-shapes-1/Overview.bs
index 40228c849952..5716a2d02e8c 100644
--- a/css-shapes-1/Overview.bs
+++ b/css-shapes-1/Overview.bs
@@ -871,7 +871,7 @@ Float Area Shape: the 'shape-outside' property</h3>
 		Name: shape-outside
 		Value: none | [ <<basic-shape>> || <<shape-box>> ] | <<image>>
 		Initial: none
-		Applies to: floats
+		Applies to: floats and [=initial letter boxes=]
 		Inherited: no
 		Computed value: as <a href="#basic-shape-computed-values">defined</a> for <<basic-shape>> (with <<shape-box>> following, if supplied); else the computed <<image>>; else the keyword as specified
 		Animation type: as <a href="#basic-shape-interpolation">defined</a> for <<basic-shape>>, otherwise discrete
@@ -1008,7 +1008,7 @@ Expanding a Shape: the 'shape-margin' property</h3>
 		Name: shape-margin
 		Value: <<length-percentage [0,∞]>>
 		Initial: 0
-		Applies to: floats
+		Applies to: floats and [=initial letter boxes=]
 		Inherited: no
 		Percentages: refer to the <a>inline size</a> of the containing block
 		Computed value: computed <<length-percentage>> value