diff --git a/src/blenderbim/blenderbim/tool/style.py b/src/blenderbim/blenderbim/tool/style.py
index 0b540c7f5e..3b52333d42 100644
--- a/src/blenderbim/blenderbim/tool/style.py
+++ b/src/blenderbim/blenderbim/tool/style.py
@@ -171,7 +171,8 @@ class Style(blenderbim.core.tool.Style):
         style_data = tool.Loader.surface_style_to_dict(surface_style)
         if style_data["ReflectanceMethod"] == "NOTDEFINED":
             style_data["ReflectanceMethod"] = "PHYSICAL"
-        style_data["DiffuseColour"] = style_data["DiffuseColour"][1]
+        diffuse_color = style_data["DiffuseColour"]
+        style_data["DiffuseColour"] = diffuse_color[1] if diffuse_color else None
 
         for prop_blender, prop_ifc in STYLE_PROPS_MAP.items():
             prop_value = style_data[prop_ifc]