diff --git a/src/slic3r/GUI/GCodeViewer.cpp b/src/slic3r/GUI/GCodeViewer.cpp
index 732403b03..e6e391d37 100644
--- a/src/slic3r/GUI/GCodeViewer.cpp
+++ b/src/slic3r/GUI/GCodeViewer.cpp
@@ -807,7 +807,7 @@ void GCodeViewer::render()
             case EMoveType::Unretract:
             case EMoveType::Seam: {
 #if ENABLE_SEAMS_USING_MODELS
-                if (wxGetApp().is_gl_version_greater_or_equal_to(3, 1)) {
+                if (wxGetApp().is_gl_version_greater_or_equal_to(3, 3)) {
                     buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::Model;
                     buffer.shader = "gouraud_light_instanced";
                     buffer.model.model.init_from(diamond(16));
@@ -1100,7 +1100,7 @@ void GCodeViewer::export_toolpaths_to_obj(const char* filename) const
     // save vertices to file
     fprintf(fp, "\n# vertices\n");
     for (const Vec3f& v : out_vertices) {
-        fprintf(fp, "v %g %g %g\n", v.x(), v.y(), v.x());
+        fprintf(fp, "v %g %g %g\n", v.x(), v.y(), v.z());
     }
 
     // save normals to file
diff --git a/src/slic3r/GUI/GLShadersManager.cpp b/src/slic3r/GUI/GLShadersManager.cpp
index c93f22f46..edbe2bb46 100644
--- a/src/slic3r/GUI/GLShadersManager.cpp
+++ b/src/slic3r/GUI/GLShadersManager.cpp
@@ -39,7 +39,7 @@ std::pair<bool, std::string> GLShadersManager::init()
     valid &= append_shader("printbed", { "printbed.vs", "printbed.fs" });
     // used to render options in gcode preview
 #if ENABLE_SEAMS_USING_MODELS
-    if (GUI::wxGetApp().is_gl_version_greater_or_equal_to(3, 1))
+    if (GUI::wxGetApp().is_gl_version_greater_or_equal_to(3, 3))
         valid &= append_shader("gouraud_light_instanced", { "gouraud_light_instanced.vs", "gouraud_light_instanced.fs" });
     else {
 #endif // ENABLE_SEAMS_USING_MODELS