diff --git a/packages/vscode/src/dialog.ts b/packages/vscode/src/dialog.ts
index 4ec06306..ff99bc70 100644
--- a/packages/vscode/src/dialog.ts
+++ b/packages/vscode/src/dialog.ts
@@ -505,9 +505,8 @@ class DialogEntryRenderer implements ITreeRenderer<DialogEntry, string, DialogEn
 	 */
 	private humanReadableSize(bytes: number): string {
 		const units = ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"];
-		const i = Math.min(Math.floor(Math.log(bytes) / Math.log(1000)), units.length - 1);
+		const i = Math.min(Math.floor(bytes && Math.log(bytes) / Math.log(1000)), units.length - 1);
 
-		return (bytes / Math.pow(1000, i)).toFixed(2)
-			+ " " + units[i];
+		return (bytes / Math.pow(1000, i)).toFixed(2) + " " + units[i];
 	}
 }