diff --git a/renderdocui/Windows/TextureViewer.cs b/renderdocui/Windows/TextureViewer.cs
index 3aeb97b63..989d57eed 100644
--- a/renderdocui/Windows/TextureViewer.cs
+++ b/renderdocui/Windows/TextureViewer.cs
@@ -1451,7 +1451,7 @@ namespace renderdocui.Windows
 
         private void UI_SetHistogramRange(FetchTexture tex)
         {
-            if (tex.format.compType == FormatComponentType.SNorm)
+            if (tex != null && tex.format.compType == FormatComponentType.SNorm)
                 rangeHistogram.SetRange(-1.0f, 1.0f);
             else
                 rangeHistogram.SetRange(0.0f, 1.0f);