diff --git a/HellionChat/Util/ImGuiUtil.cs b/HellionChat/Util/ImGuiUtil.cs
index 4db4141..cc5187a 100755
--- a/HellionChat/Util/ImGuiUtil.cs
+++ b/HellionChat/Util/ImGuiUtil.cs
@@ -583,7 +583,9 @@ internal static class ImGuiUtil
 
         using (ImRaii.Disabled(isMax))
         {
-            if (IconButton(FontAwesomeIcon.ArrowRight, id + 1.ToString()))
+            // Parentheses pin the operator precedence: without them this resolves as
+            // id.ToString() + "1" (e.g. "01" instead of "1").
+            if (IconButton(FontAwesomeIcon.ArrowRight, (id + 1).ToString()))
                 selected++;
         }