diff --git a/web/chat/composed-message.react.js b/web/chat/composed-message.react.js
--- a/web/chat/composed-message.react.js
+++ b/web/chat/composed-message.react.js
@@ -164,7 +164,7 @@
         <div className={css.sidebarMarginBottom}>
           <InlineSidebar
             threadInfo={item.threadCreatedFromMessage}
-            positioning={positioning}
+            position={positioning}
           />
         </div>
       );
diff --git a/web/chat/inline-sidebar.react.js b/web/chat/inline-sidebar.react.js
--- a/web/chat/inline-sidebar.react.js
+++ b/web/chat/inline-sidebar.react.js
@@ -11,7 +11,7 @@
 
 type Props = {
   +threadInfo: ThreadInfo,
-  +positioning: 'left' | 'center' | 'right',
+  +position: 'left' | 'center' | 'right',
 };
 function InlineSidebar(props: Props): React.Node {
   const { threadInfo } = props;
diff --git a/web/chat/robotext-message.react.js b/web/chat/robotext-message.react.js
--- a/web/chat/robotext-message.react.js
+++ b/web/chat/robotext-message.react.js
@@ -51,7 +51,7 @@
         <div className={css.sidebarMarginTop}>
           <InlineSidebar
             threadInfo={this.props.item.threadCreatedFromMessage}
-            positioning="center"
+            position="center"
           />
         </div>
       );