diff --git a/xs/src/libslic3r/SLAPrint.cpp b/xs/src/libslic3r/SLAPrint.cpp
index e32d45d26..0f98b79ee 100644
--- a/xs/src/libslic3r/SLAPrint.cpp
+++ b/xs/src/libslic3r/SLAPrint.cpp
@@ -220,10 +220,11 @@ SLAPrint::write_svg(const std::string &outputfile) const
     for (size_t i = 0; i < this->layers.size(); ++i) {
         const Layer &layer = this->layers[i];
         fprintf(f,
-            "\t<g id=\"layer%zu\" slic3r:z=\"%0.4f\" slic3r:slice-z=\"%0.4f\" slic3r:layer-height=\"%0.4f\">\n", i,
+            "\t<g id=\"layer%zu\" slic3r:z=\"%0.4f\" slic3r:slice-z=\"%0.4f\" slic3r:layer-height=\"%0.4f\">\n",
+            i,
             layer.print_z,
             layer.slice_z,
-            layer.print_z - (i == 0 ? 0 : this->layers[i-1].print_z)
+            layer.print_z - ((i == 0) ? 0. : this->layers[i-1].print_z)
         );
         
         if (layer.solid) {
diff --git a/xs/src/libslic3r/SVG.cpp b/xs/src/libslic3r/SVG.cpp
index 444810044..5fb0e7d5f 100644
--- a/xs/src/libslic3r/SVG.cpp
+++ b/xs/src/libslic3r/SVG.cpp
@@ -20,7 +20,7 @@ SVG::SVG(const char* filename)
 }
 
 SVG::SVG(const char* filename, const BoundingBox &bbox)
-    : arrows(false), fill("grey"), stroke("black"), filename(filename), origin(bbox.min)
+    : arrows(false), fill("grey"), stroke("black"), origin(bbox.min), filename(filename)
 {
     this->f = fopen(filename, "w");
     float w = COORD(bbox.max.x - bbox.min.x);