diff --git a/qalculator.cpp b/qalculator.cpp
index 77c875d..276d125 100644
--- a/qalculator.cpp
+++ b/qalculator.cpp
@@ -2,6 +2,8 @@
 #include <libqalculate/qalculate.h>
 #include <string>
 
+EvaluationOptions user_evaluation_options = default_evaluation_options;
+
 const char* qalculate(const char* input, bool exact_mode) {
     Calculator* c = new Calculator();
     c->loadExchangeRates();
@@ -10,11 +12,11 @@ const char* qalculate(const char* input, bool exact_mode) {
     std::string Input = input;
     std::string Output;
     if (exact_mode) {
-        default_user_evaluation_options.approximation = APPROXIMATION_EXACT;
+        user_evaluation_options.approximation = APPROXIMATION_EXACT;
     } else {
-        default_user_evaluation_options.approximation = APPROXIMATION_APPROXIMATE;
+        user_evaluation_options.approximation = APPROXIMATION_APPROXIMATE;
     }
-    Output = c->calculateAndPrint(Input,2000,default_user_evaluation_options);
+    Output = c->calculateAndPrint(Input,2000,user_evaluation_options);
     delete c;
     char * output = new char [Output.length()+1];
     Output.copy(output,Output.length());