diff --git a/src/libslic3r/Technologies.hpp b/src/libslic3r/Technologies.hpp
index 5a749eea91..13bba02882 100644
--- a/src/libslic3r/Technologies.hpp
+++ b/src/libslic3r/Technologies.hpp
@@ -58,13 +58,6 @@
 #define ENABLE_PREVIEW_LAYER_TIME (1 && ENABLE_2_5_0_ALPHA1)
 // Enable showing time estimate for travel moves in legend
 #define ENABLE_TRAVEL_TIME (1 && ENABLE_2_5_0_ALPHA1)
-
-
-//====================
-// 2.5.0.alpha1 techs
-//====================
-#define ENABLE_2_5_0_ALPHA1 1
-
 // Enable editing volumes transformation in world coordinates and instances in local coordinates
 #define ENABLE_WORLD_COORDINATE (1 && ENABLE_2_5_0_ALPHA1)
 // Enable showing world coordinates of volumes' offset relative to the instance containing them
diff --git a/src/slic3r/GUI/Selection.cpp b/src/slic3r/GUI/Selection.cpp
index ed040b2bbc..0183cdb48a 100644
--- a/src/slic3r/GUI/Selection.cpp
+++ b/src/slic3r/GUI/Selection.cpp
@@ -2081,7 +2081,7 @@ void Selection::render_sidebar_position_hints(const std::string& sidebar_field)
 
 void Selection::render_sidebar_rotation_hints(const std::string& sidebar_field) const
 {
-    auto render_sidebar_rotation_hint = [this](const std::array<float, 4>& color) {
+    auto render_sidebar_rotation_hint = [this](const ColorRGBA& color) {
         const_cast<GLModel*>(&m_curved_arrow)->set_color(-1, color);
         m_curved_arrow.render();
         glsafe(::glRotated(180.0, 0.0, 0.0, 1.0));