diff --git a/css-flexbox/Overview.bs b/css-flexbox/Overview.bs
index 9141fd65856..d6bc44a6324 100644
--- a/css-flexbox/Overview.bs
+++ b/css-flexbox/Overview.bs
@@ -904,6 +904,8 @@ Implied Minimum Size of Flex Items
However, if the box has an aspect ratio and no specified size,
its automatic minimum size
is the smaller of its content size and its transferred size.
+ If the box has neither a specified size nor an aspect ratio,
+ its automatic minimum size is the content size.
The content size, specified size, and transferred size
used in this calculation account for the relevant min/max/preferred size properties