diff --git a/xs/src/libslic3r/Utils.hpp b/xs/src/libslic3r/Utils.hpp
index 349222854..f1390b8a2 100644
--- a/xs/src/libslic3r/Utils.hpp
+++ b/xs/src/libslic3r/Utils.hpp
@@ -97,8 +97,9 @@ public:
     void call(int i) const;
     void call(int i, int j) const;
     void call(const std::vector<int>& ints) const;
-    void call(double d) const;
+    void call(double a) const;
     void call(double a, double b) const;
+    void call(double a, double b, double c) const;
     void call(double a, double b, double c, double d) const;
     void call(bool b) const;
 private:
diff --git a/xs/src/libslic3r/utils.cpp b/xs/src/libslic3r/utils.cpp
index 55164bbdd..95aaf5453 100644
--- a/xs/src/libslic3r/utils.cpp
+++ b/xs/src/libslic3r/utils.cpp
@@ -251,7 +251,7 @@ void PerlCallback::call(const std::vector<int>& ints) const
     LEAVE;
 }
 
-void PerlCallback::call(double d) const
+void PerlCallback::call(double a) const
 {
     if (!m_callback)
         return;
@@ -259,7 +259,7 @@ void PerlCallback::call(double d) const
     ENTER;
     SAVETMPS;
     PUSHMARK(SP);
-    XPUSHs(sv_2mortal(newSVnv(d)));
+    XPUSHs(sv_2mortal(newSVnv(a)));
     PUTBACK;
     perl_call_sv(SvRV((SV*)m_callback), G_DISCARD);
     FREETMPS;
@@ -282,6 +282,23 @@ void PerlCallback::call(double a, double b) const
     LEAVE;
 }
 
+void PerlCallback::call(double a, double b, double c) const
+{
+    if (!m_callback)
+        return;
+    dSP;
+    ENTER;
+    SAVETMPS;
+    PUSHMARK(SP);
+    XPUSHs(sv_2mortal(newSVnv(a)));
+    XPUSHs(sv_2mortal(newSVnv(b)));
+    XPUSHs(sv_2mortal(newSVnv(c)));
+    PUTBACK;
+    perl_call_sv(SvRV((SV*)m_callback), G_DISCARD);
+    FREETMPS;
+    LEAVE;
+}
+
 void PerlCallback::call(double a, double b, double c, double d) const
 {
     if (!m_callback)