diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index 7e2605d..c9d9ab2 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -11,6 +11,10 @@
 
 static Calculator calculator;
 
+Calculator CALCULATE_LIBRARY_API *get_calculator() {
+    return &calculator;
+}
+
 int CALCULATE_LIBRARY_API get_zone_nr(int zone)
 {
     if(zone > -1) return zone;