diff --git a/src/Mod/Arch/importIFC.py b/src/Mod/Arch/importIFC.py
index 90d91cf87d..23c5f52986 100644
--- a/src/Mod/Arch/importIFC.py
+++ b/src/Mod/Arch/importIFC.py
@@ -272,7 +272,7 @@ def insert(filename,docname,skip=[],only=[],root=None,preferences=None):
     groups = importIFCHelper.buildRelGroups(ifcfile)
     subtractions = importIFCHelper.buildRelSubtractions(ifcfile)
     mattable = importIFCHelper.buildRelMattable(ifcfile)
-    colors, style_material_id = importIFCHelper.buildRelColors(ifcfile, prodrepr)
+    colors = importIFCHelper.buildRelColors(ifcfile, prodrepr)
     if preferences['DEBUG']: print("done.")
 
     # only import a list of IDs and their children, if defined
diff --git a/src/Mod/Arch/importIFCHelper.py b/src/Mod/Arch/importIFCHelper.py
index 67b97dbf65..23fdd5317f 100644
--- a/src/Mod/Arch/importIFCHelper.py
+++ b/src/Mod/Arch/importIFCHelper.py
@@ -273,7 +273,7 @@ def buildRelColors(ifcfile, prodrepr):
         if k in style_color_rgb:
             colors[style_material_id[k]] = style_color_rgb[k]
 
-    return colors, style_material_id
+    return colors
 
 
 def getRelProperties(ifcfile):