diff --git a/src/libslic3r/PrintBase.cpp b/src/libslic3r/PrintBase.cpp
index 7de74035b..b60401e96 100644
--- a/src/libslic3r/PrintBase.cpp
+++ b/src/libslic3r/PrintBase.cpp
@@ -26,14 +26,17 @@ void PrintBase::update_object_placeholders(DynamicConfig &config, const std::str
     // get the first input file name
     std::string input_file;
     std::vector<std::string> v_scale;
+    int num_objects = 0;
+    int num_instances = 0;
 	for (const ModelObject *model_object : m_model.objects) {
 		ModelInstance *printable = nullptr;
 		for (ModelInstance *model_instance : model_object->instances)
 			if (model_instance->is_printable()) {
 				printable = model_instance;
-				break;
+				++ num_instances;
 			}
 		if (printable) {
+            ++ num_objects;
 	        // CHECK_ME -> Is the following correct ?
 			v_scale.push_back("x:" + boost::lexical_cast<std::string>(printable->get_scaling_factor(X) * 100) +
 				"% y:" + boost::lexical_cast<std::string>(printable->get_scaling_factor(Y) * 100) +
@@ -43,6 +46,9 @@ void PrintBase::update_object_placeholders(DynamicConfig &config, const std::str
 	    }
     }
     
+    config.set_key_value("num_objects", new ConfigOptionInt(num_objects));
+    config.set_key_value("num_instances", new ConfigOptionInt(num_instances));
+
     config.set_key_value("scale", new ConfigOptionStrings(v_scale));
     if (! input_file.empty()) {
         // get basename with and without suffix