diff --git a/Runtime/Serie/Serie.cs b/Runtime/Serie/Serie.cs
index 695d68f6..c5e193ad 100644
--- a/Runtime/Serie/Serie.cs
+++ b/Runtime/Serie/Serie.cs
@@ -1684,6 +1684,7 @@ namespace XCharts.Runtime
 
         public float GetBarWidth(float categoryWidth, int barCount = 0)
         {
+            if (categoryWidth < 2) return categoryWidth;
             if (m_BarWidth == 0)
             {
                 var width = ChartHelper.GetActualValue(0.6f, categoryWidth);