diff --git a/lib/Slic3r/Model.pm b/lib/Slic3r/Model.pm
index 22a76100d..6ec3fc1bf 100644
--- a/lib/Slic3r/Model.pm
+++ b/lib/Slic3r/Model.pm
@@ -122,7 +122,7 @@ sub add_instance {
         
         my $new_instance = $self->_add_instance;
         
-        $new_instance->set_rotation($args{rotation})
+        $new_instance->set_rotations($args{rotation})
             if defined $args{rotation};
         $new_instance->set_scaling_factor($args{scaling_factor})
             if defined $args{scaling_factor};
diff --git a/xs/src/libslic3r/ModelArrange.hpp b/xs/src/libslic3r/ModelArrange.hpp
index 9f983ee9f..b203193ef 100644
--- a/xs/src/libslic3r/ModelArrange.hpp
+++ b/xs/src/libslic3r/ModelArrange.hpp
@@ -687,8 +687,7 @@ void applyResult(
 
         // write the transformation data into the model instance
 #if ENABLE_MODELINSTANCE_3D_ROTATION
-        // CHECK_ME -> Is the following correct ?
-        inst_ptr->set_rotation(Vec3d(0.0, 0.0, rot));
+        inst_ptr->set_rotation(Z, rot);
 #else
         inst_ptr->rotation = rot;
 #endif // ENABLE_MODELINSTANCE_3D_ROTATION
diff --git a/xs/xsp/Model.xsp b/xs/xsp/Model.xsp
index 892ecd861..d5192cf8e 100644
--- a/xs/xsp/Model.xsp
+++ b/xs/xsp/Model.xsp
@@ -365,8 +365,8 @@ ModelMaterial::attributes()
         %code%{ RETVAL = THIS->get_object(); %};
 
 #if ENABLE_MODELINSTANCE_3D_ROTATION
-    double rotation()
-        %code%{ RETVAL = THIS->get_rotation(Z); %};
+    Vec3d* rotation()
+        %code%{ RETVAL = new Vec3d(THIS->get_rotation(X), THIS->get_rotation(Y), THIS->get_rotation(Z)); %};
 #else
     double rotation()
         %code%{ RETVAL = THIS->rotation; %};