diff --git a/Models/RotationWidget.obj b/Models/RotationWidget.obj
index 94d314b..e028dc6 100644
--- a/Models/RotationWidget.obj
+++ b/Models/RotationWidget.obj
@@ -1,6 +1,6 @@
 # This file uses centimeters as units for non-parametric coordinates.
 
-mtllib rotate_widget.mtl
+mtllib RotationWidget.mtl
 g rotate_widget:default1
 v 0.466018 0.000000 -0.151418
 v 0.396419 0.000000 -0.288015
diff --git a/Models/ScaleWidget.obj b/Models/ScaleWidget.obj
index d457258..6d2ff6f 100644
--- a/Models/ScaleWidget.obj
+++ b/Models/ScaleWidget.obj
@@ -1,6 +1,6 @@
 # This file uses centimeters as units for non-parametric coordinates.
 
-mtllib scale_widget.mtl
+mtllib ScaleWidget.mtl
 g scale_widget:default1
 v -0.010000 0.000000 0.010000
 v 0.010000 0.000000 0.010000
diff --git a/Models/TranslationWidget.obj b/Models/TranslationWidget.obj
index 4ba9b9a..6623fbc 100644
--- a/Models/TranslationWidget.obj
+++ b/Models/TranslationWidget.obj
@@ -1,6 +1,6 @@
 # This file uses meters as units for non-parametric coordinates.
 
-mtllib translate_widget.mtl
+mtllib TranslationWidget.mtl
 g default
 v 0.008660 0.005000 -0.000000
 v 0.005000 0.008660 -0.000000