diff --git a/src/libslic3r/Utils.hpp b/src/libslic3r/Utils.hpp
index 0fbad537c..7f2c94f03 100644
--- a/src/libslic3r/Utils.hpp
+++ b/src/libslic3r/Utils.hpp
@@ -68,6 +68,8 @@ namespace PerlUtils {
     extern std::string path_to_parent_path(const char *src);
 };
 
+std::string string_printf(const char *format, ...);
+
 // Timestamp formatted for header_slic3r_generated().
 extern std::string timestamp_str();
 // Standard "generated by Slic3r version xxx timestamp xxx" header string, 
diff --git a/src/libslic3r/utils.cpp b/src/libslic3r/utils.cpp
index 466df8a35..7a51a6104 100644
--- a/src/libslic3r/utils.cpp
+++ b/src/libslic3r/utils.cpp
@@ -3,6 +3,8 @@
 
 #include <locale>
 #include <ctime>
+#include <cstdarg>
+#include <stdio.h>
 
 #ifdef WIN32
 #include <windows.h>
@@ -297,6 +299,25 @@ namespace PerlUtils {
     std::string path_to_parent_path(const char *src)    { return boost::filesystem::path(src).parent_path().string(); }
 };
 
+
+std::string string_printf(const char *format, ...)
+{
+    va_list args1;
+    va_start(args1, format);
+    va_list args2;
+    va_copy(args2, args1);
+
+    size_t needed_size = ::vsnprintf(nullptr, 0, format, args1) + 1;
+    va_end(args1);
+
+    std::string res(needed_size, '\0');
+    ::vsnprintf(&res.front(), res.size(), format, args2);
+    va_end(args2);
+
+    return res;
+}
+
+
 std::string timestamp_str()
 {
     const auto now = boost::posix_time::second_clock::local_time();
diff --git a/src/slic3r/GUI/GLGizmo.cpp b/src/slic3r/GUI/GLGizmo.cpp
index b8988077e..54dd1427d 100644
--- a/src/slic3r/GUI/GLGizmo.cpp
+++ b/src/slic3r/GUI/GLGizmo.cpp
@@ -275,10 +275,7 @@ void GLGizmoBase::set_tooltip(const std::string& tooltip) const
 
 std::string GLGizmoBase::format(float value, unsigned int decimals) const
 {
-    size_t needed_size = std::snprintf(nullptr, 0, "%.*f", decimals, value);
-    std::string res(needed_size, '\0');
-    std::snprintf(&res.front(), res.size(), "%.*f", decimals, value);
-    return res;
+    return Slic3r::string_printf("%.*f", decimals, value);
 }
 
 const float GLGizmoRotate::Offset = 5.0f;
diff --git a/xs/xsp/Model.xsp b/xs/xsp/Model.xsp
index ffcb81def..6091d00ad 100644
--- a/xs/xsp/Model.xsp
+++ b/xs/xsp/Model.xsp
@@ -231,12 +231,6 @@ ModelMaterial::attributes()
     void rotate(float angle, Vec3d* axis)
         %code{% THIS->rotate(angle, *axis); %};
     void mirror(Axis axis);
-    
-    Model* cut(double z)
-        %code%{
-            RETVAL = new Model();
-            THIS->cut(z, RETVAL);
-        %};
 
     ModelObjectPtrs* split_object()
         %code%{