diff --git a/xs/xsp/Print.xsp b/xs/xsp/Print.xsp
index 7565de474..852f0dde0 100644
--- a/xs/xsp/Print.xsp
+++ b/xs/xsp/Print.xsp
@@ -215,7 +215,11 @@ _constant()
     bool has_infinite_skirt();
     bool has_skirt();
     std::vector<unsigned int> extruders() const;
-    void validate() %code%{ std::string err = THIS->validate(); if (! err.empty()) throw std::exception(err.c_str()); %};
+    void validate() %code%{ 
+            std::string err = THIS->validate(); 
+            if (! err.empty()) 
+                throw std::invalid_argument(err.c_str()); 
+        %};
     Clone<BoundingBox> bounding_box();
     Clone<BoundingBox> total_bounding_box();
     double skirt_first_layer_height();