diff --git a/src/libslic3r/PrintExport.hpp b/src/libslic3r/PrintExport.hpp
index 5b0a91177..04b993a52 100644
--- a/src/libslic3r/PrintExport.hpp
+++ b/src/libslic3r/PrintExport.hpp
@@ -224,7 +224,7 @@ public:
 
     inline void draw_polygon(const ClipperLib::Polygon& p, unsigned lyr) {
         assert(lyr < m_layers_rst.size());
-        m_layers_rst[lyr].first.draw(p);
+        m_layers_rst[lyr].raster.draw(p);
     }
 
     inline void begin_layer(unsigned lyr) {
diff --git a/src/libslic3r/SLAPrint.cpp b/src/libslic3r/SLAPrint.cpp
index ba6e5a904..9e03b6f84 100644
--- a/src/libslic3r/SLAPrint.cpp
+++ b/src/libslic3r/SLAPrint.cpp
@@ -1143,7 +1143,7 @@ void SLAPrint::process()
             for (const ClipperPolygon& polygon : supports_polygons)
                 layer_support_area += area(polygon);
 
-            if (layer_support_area < 0 || layer_model_area > 0)
+            if (layer_support_area < 0 || layer_support_area > 0)
                 supports_volume += layer_support_area * l_height;
 
             // Here we can save the expensively calculated polygons for printing