diff --git a/scm-ui/src/repos/sources/components/FileSize.js b/scm-ui/src/repos/sources/components/FileSize.js
index 1f613ad9fc..d45157237d 100644
--- a/scm-ui/src/repos/sources/components/FileSize.js
+++ b/scm-ui/src/repos/sources/components/FileSize.js
@@ -6,9 +6,9 @@ type Props = {
 };
 
 class FileSize extends React.Component<Props> {
-  static format(bytes) {
+  static format(bytes: number) {
     if (!bytes) {
-      return "";
+      return "0 B";
     }
 
     const units = ["B", "K", "M", "G", "T", "P", "E", "Z", "Y"];
diff --git a/scm-ui/src/repos/sources/components/FileSize.test.js b/scm-ui/src/repos/sources/components/FileSize.test.js
index 1bbe511eb1..8ecb53e1bb 100644
--- a/scm-ui/src/repos/sources/components/FileSize.test.js
+++ b/scm-ui/src/repos/sources/components/FileSize.test.js
@@ -1,7 +1,8 @@
 import FileSize from "./FileSize";
 
 it("should format bytes", () => {
-  expect(FileSize.format(160)).toBe("160.00 B");
+  expect(FileSize.format(0)).toBe("0 B");
+  expect(FileSize.format(160)).toBe("160 B");
   expect(FileSize.format(6304)).toBe("6.16 K");
   expect(FileSize.format(28792588)).toBe("27.46 M");
   expect(FileSize.format(1369510189)).toBe("1.28 G");
diff --git a/scm-ui/src/repos/sources/components/FileTreeLeaf.js b/scm-ui/src/repos/sources/components/FileTreeLeaf.js
index 7751f4dff9..5224ba3ded 100644
--- a/scm-ui/src/repos/sources/components/FileTreeLeaf.js
+++ b/scm-ui/src/repos/sources/components/FileTreeLeaf.js
@@ -62,13 +62,13 @@ class FileTreeLeaf extends React.Component<Props> {
   render() {
     const { file, classes } = this.props;
 
+    const fileSize = file.directory ? "" : <FileSize bytes={file.length} />;
+
     return (
       <tr>
         <td className={classes.iconColumn}>{this.createFileIcon(file)}</td>
         <td>{this.createFileName(file)}</td>
-        <td>
-          <FileSize bytes={file.length} />
-        </td>
+        <td>{fileSize}</td>
         <td>
           <DateFromNow date={file.lastModified} />
         </td>