diff --git a/src/components/views/rooms/BasicMessageComposer.tsx b/src/components/views/rooms/BasicMessageComposer.tsx
index d83e2e964a..7afd39a5b1 100644
--- a/src/components/views/rooms/BasicMessageComposer.tsx
+++ b/src/components/views/rooms/BasicMessageComposer.tsx
@@ -182,15 +182,16 @@ export default class BasicMessageEditor extends React.Component<IProps, IState>
             if (data) {
                 const { partCreator } = model;
                 const moveStart = emoticonMatch[0][0] === " " ? 1 : 0;
-                const moveEnd = emoticonMatch[0].length - emoticonMatch.length - moveStart;
 
                 // we need the range to only comprise of the emoticon
                 // because we'll replace the whole range with an emoji,
                 // so move the start forward to the start of the emoticon.
                 // Take + 1 because index is reported without the possible preceding space.
                 range.moveStartForwards(emoticonMatch.index + moveStart);
-                // and move end backwards so that we don't replace the trailing space/newline
-                range.moveEndBackwards(moveEnd);
+                // If the end is a trailing space/newline move end backwards, so that we don't replace it
+                if (["\n", " "].includes(emoticonMatch[0][emoticonMatch[0].length - 1])) {
+                    range.moveEndBackwards(1);
+                }
 
                 // this returns the amount of added/removed characters during the replace
                 // so the caret position can be adjusted.