diff --git a/src/libslic3r/Emboss.cpp b/src/libslic3r/Emboss.cpp
index 904cd11126..acebd93c8c 100644
--- a/src/libslic3r/Emboss.cpp
+++ b/src/libslic3r/Emboss.cpp
@@ -6,6 +6,8 @@
 
 #define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation
 #include "imgui/imstb_truetype.h" // stbtt_fontinfo
+#include "imgui/imgui.h" // free memory from stb
+#include "Utils.hpp" // ScopeGuard
 
 #include <Triangulation.hpp> // CGAL project
 #include "libslic3r.h"
@@ -75,12 +77,17 @@ std::optional<Emboss::Glyph> Private::get_glyph(const stbtt_fontinfo &font_info,
     stbtt_vertex *vertices;
     int num_verts = stbtt_GetGlyphShape(&font_info, glyph_index, &vertices);
     if (num_verts <= 0) return glyph; // no shape
+    ScopeGuard sg1([&vertices]() { ImGui::MemFree(vertices); });
 
     int *contour_lengths = NULL;
     int  num_countour_int = 0;
-
     stbtt__point *points = stbtt_FlattenCurves(vertices, num_verts,
         flatness, &contour_lengths, &num_countour_int, font_info.userdata);
+    if (!points) return glyph; // no valid flattening
+    ScopeGuard sg2([&contour_lengths, &points]() {
+        ImGui::MemFree(contour_lengths); 
+        ImGui::MemFree(points); 
+    });
 
     size_t   num_contour = static_cast<size_t>(num_countour_int);
     Polygons glyph_polygons;
@@ -109,6 +116,7 @@ std::optional<Emboss::Glyph> Private::get_glyph(const stbtt_fontinfo &font_info,
         std::reverse(pts.begin(), pts.end());
         glyph_polygons.emplace_back(pts);
     }
+    
     // fix for bad defined fonts
     glyph.shape = Slic3r::union_ex(glyph_polygons);